why did you pick an iPad vs. android or vice versa ?

Curious what you guys think, as I need to get a pad. 
The only thing I know that I don't like is the proprietary nature of Apple. I do like their products though. Have a MacBook, PCs and cheap Android phone. I also noticed that iPads don't come with mini USB power like the rest of the world. So, another friggin cord..
 
Anyway. Samsung (10") or iPad (9.7") ?
 

I went the iPad route when I got one (its an old iPad).  I had an iPhone as one app that I wanted was only offered for the iPhone (Peterson strobe tuner).  More audio apps seem to be IOS.  My wife bought an Android tablet from QVC.  I'm not impressed with it at all compared to the iPad.  Different apps, update procedure seems clunky, etc.
 
However, I'm not an Apple PC fan.  Can't see paying 3 times as much for the same hardware.   

I went iPad to use for small remote recording gigs. Works fine for that. Also, the apps available for digital mixers, which I need in my line of work. Now that I've had one for a while, I like it.

Once you have owned and use it for a while you will never go back.  For all the things you mentioned they are great. Once you have also been using an iPad for a while you realise how clunky and simply ridiculous any Windows tablet actually is in comparison. 
 
If you have Apple TV you can call up stuff on your iPad and simply direct it to Apple TV and stream anything from the iPad to Apple TV and hence your TV screen and audio. I do this all the time. 
 
Also if you invest in a dock you can dock the iPad and use it as an instrument. Feeding Midi In and Out and Audio IN/OUT as well. The converters in a dock are much nicer than any built in iPad converters as well. I am running 4 synths on mine very well might I add and it sounds sensational. Just got PPG Infinite for it too. Only on iOS at the moment.  One very serious sounding instrument. 
 
There are some great remote apps. Studio One has a free one which controls either a Windows or Mac computer running Studio One.
 
Check this out too:
 
https://www.synth-expert.com/news-blog/2017/8/16/metagrid-turns-your-ipad-into-a-powerful-custom-daw-and-software-controller
 
This only runs on iOS as well. This is one very cool app. 
 
You can also get some very classy X/Y pad controller apps to for iOS and use them to talk to either a Windows or Mac machine.

timidi
It's looking like iPads in the lead.
 
I guess I should have mentioned that my main need/want right now is for maps, internet, netflix, travel.

If that is all you need, then Android will do the job, for less money.  Android is perfect for general computing, internet, etc.  I have a 5 year old Toshiba 10" that plays Netflix just fine over a wifi connection.  So I mostly just use it for Netflix, or my Amazon Kindle ebooks, or to play my MP3 collection.  Once connected to wifi, all the connected apps work fine.
 
But if you want to access the large number of music apps for iOS, the iPad would be the way to go.  It seems that is where all the music app development is being focused.

iPad - smooth running, just gets on with it. Good, easy to use operating system. OS updates direct from Apple so no worries about obtaining them - some android users with phone contracts don't get updates to the OS because the phone company won't supply them.

Huge range of apps, some very good, many absolute rubbish but that't the same for all tablet OSs. One advantage of the Apple Store approach, where you can only install apps from there, is that it makes it much harder for the malicious to distribute malware.

Also integrates very well indeed with Macs (at last). We use Macs as the only computers now (tried Win10 and hated it), if you're going to be using Windows you'll lose some functionality but I don't know if Windows tablets can work with PCs in the same kind of way.

The hardware is very resiliant, I've given an original iPad Air a huge amount of use since I bought it when they first came out and it's still going strong. I recently got a 9,3" Pro and for most people's computer usage I suspect it would suffice on its own. Noticably quicker than the Air mk 1 as well. Retina screens are superb displays as well. The Apple pencil thing is expensive, but if you're into photography or artwork is really usefull. Add a third party app and it turns the iPad into a very serious graphics tablet.

Downsides. iTunes is necessary, but it's nothing like as bad as many say. Behaves itself well on the whole and isn't a bad media player at all. You don't even strictly speaking need it, but it's useful for local backups of the iPad and getting media and data on and off the iPad. Just make sure the first thing you do with iTunes is go into the preferences and ensure it's not busily moving all your media files, including recordings, to its own library. :-/

Once in a while iPads get confused, a hard reboot, or if that doesn't restore sanity returning them to original factory settings and reloading your stuff is simple, so long as you have a backup.

Siri. Probably better than Cortana, but as far as I'm concerned both are best terminated with extreme prejudice. Unlike Cortana, once switched off Siri stays off.

iCloud. We only use it for syncing a limited amount of data between tablet/phone/Mac. Photos, music and everything else we store locally.

And don't forget your itunes account/Apple user id and password. The stories of bricked iOS devices following major OS updates almost all boiled down to "it asked me for my account password before loading all my personal stuff and I can't remember it".

I have never had either, but found out that there are a lot of apps available only in IOS. I got to try out a few supporting apps (Studio One Remote in demo mode, apps for a Fretlight I bought as a gift) and was surprised how smooth it ran. Plus it came with GarageBand for free, so can play with it without buying anything.

Not gotten one yet, since I have no real need, but I know a lot of folks personally with one (there is also a wifi only version, so works in range of wifi without a data plan from a provider). I do not know anyone with a Windows tablet (yet).

Windows actually integrates well between desktop, tablet and phone (yes, I am the last one in the world with one of 'em).  It is the same OS on all of them, you can load the same programs and apps on each of them, and share any info you have put online between the hardware.  I haven't tried to load in SONAR on my phone, but I wouldn't want to do any sound work on it any way, or type a Russian novel on it.  So it works better in theory than practice, but I could ....

While the iPAD is nice for running remote software, remote-recording, some soft-synths (albeit limited in capability), etc... having to use iTunes to simply move data is **royal bass-akwards**  
 
On an Android, if you want to move an audio file, you connect via USB and drag/drop.
Yep... it's that simple.  My data... and I can immediately access it and do what I wish.
 
Want to move an audio file with your iPhone or iPad?  You've got to fire up iTunes.
Is it a "Voice Memo" or "song"?  
Slow and tedious... because Apple wants complete control.
 
If Android had the same level of (music related) support, I'd use Android exclusively.
 
 

If it's a travel computer,, I just use my iphone.
As said all the cool apps for music are on OS. I also have a older iPad at home and we have one at work too. The one at work is the 2nd gen the one at home is 3rd gen. All have the same up to date OS so other than the processing speed and the camera quality all  3 of these iOS devices I use are identical to learn and use. I find the OS very logical and other than the above mentioned stupid transferring of data issue they are well thought out. Aslo both old iPAds batteries are toast and cannot be easily replaced so it makes them useless for a lot of things. 
 
I have not purchased it yet but I want to try using "on Song" for displaying my lyrics at gigs. I don't see an app like that for Android. 
Right now I use my little Asus  netbook running Power point and it works fine. 
And speaking of netbooks, mine is 10 years old now, running XP I have used it for hundreds of live gigs for playback and now lyrics and it still runs a smooth a silk. I put an SSD drive in it ad it boots up in a whoping 20 sec ( XP remember was over 1 min. I have also taken it traveling with me for internet. It runs 10 hours on a full charge still and the ssd drive improved that too. 

double post.

Funny thing is if I remember history Atari and Apple used drag and drop long before PC.
You can drag and drop the Photo's from the Camera folder but you can't delete them.  
There's no access to the Music or text file folders so if you want to load your MP'3 backing tracks or lyrics into an iPad or phone you are forced to use iTunes. 
The other huge PITA is they have no SD card slots so your forced to pay $100 for a lousy extra few GB's. 
 

I got an iPad last year because I had an iPhone and can run most apps on either, simple as that. If I had an Android phone, I would go that route instead. I'm a believer in not going out of my way to have to learn a new interface paradigm unless there are significant benefits.
 
There are many excellent and relatively inexpensive ios music apps from DAW remote controls, touch controllers, tuners, spectrum analyzers, oscilloscopes, and SPL level meters to synth and FX apps and even mini DAWs. Unfortunately it is indeed difficult to move files around under ios and really it's generally unnecessarily difficult to do anything with Apple products in a way Apple doesn't want you to do it.
 
There are lots of sites for music apps such as this one:
http://musicappblog.com/
 
With Apple, if you want to use ios compatible devices like audio/midi interfaces, you need to buy an overpriced "camera connection kit" and powered USB hub to provide power to the interface. Sadly, many places say only buy the overpriced Apple connector or it might not work reliably. And you cannot just plug in a USB adapter - you need the connection kit.
 
 
Whatever you get, don't skimp too much on memory/storage.
 
I also highly recommend a gooseneck tablet mounting thingy that clamps on to things. It's just awesome having a controller right there - mine is positioned inches above the pitch wheel on my main controller.

AndyB01 The apps tend to be built to a better and more consistent standard (ask app developers and they will tell you they have fewer variables to cater for) and for general build quality, screen response and sound quality the iPads seem to win. I've tried music apps on both - a few decent but many are in the ToysRUs category (by which I mean they are more novelty than serious) but once again the iPad apps seem better, more stable. I also find that integration with some hardware (my Roland controller being one example and the TaylorSense ES2 system being another) leans more towards IOS (there isn't any Android equivalent for these).

One thing we should probably point out (and I have no idea if this is true about Android), but Apple OS upgrades sometimes render certain apps completely useless unless the developer is actively maintaining updates for that particular app. Part of the "Apple way" is to move forward and backward compatibility is the developer's and user's problem. This fall a lot of older, no longer maintained apps will just die with a big OS upgrade that Apple basically forces you to do*.
 
*last time I looked, the only way to get out of an ios update was to turn on site blocking and add Apple's update servers to the blacklist, as if they were serving up naughty pictures or something. Amusing, but not a workable solution for me. 

Cactus Music
Aslo both old iPAds batteries are toast and cannot be easily replaced so it makes them useless for a lot of things. 

Apple stores can usually replace the battery, and they also do a "send it in and we'll fix it" service. A battery in the UK currently costs around £100 I believe.