Having had and used both for several years, I would not consider the Saffire Pro 40 an upgrade.  I would consider it a mostly backward step.  Its like having a basic model of a car and a deluxe model.  Both will get you from point a to point b, but the deluxe model has extra features that make getting there better. 
 
Read guru Craig Anderton's (who is a forum staff member) evaluation of the Octa-Capture.  Its the "next best thing to girls" (LOL) 
 
 
 
 

fireberd
Having had and used both for several years, I would not consider the Saffire Pro 40 an upgrade.  I would consider it a mostly backward step.  Its like having a basic model of a car and a deluxe model.  Both will get you from point a to point b, but the deluxe model has extra features that make getting there better. 
 
Read guru Craig Anderton's (who is a forum staff member) evaluation of the Octa-Capture.  Its the "next best thing to girls" (LOL) 
 
 
 
 

Just curious what would you consider an upgrade to the Octa-Capture besides the Studio Capture

Depends on how many mic preamps you want on the new device.  The RME's are highly rated, but only have limited mic preamps. The RME Fireface UC (USB and Firewire) only has two mic preamps.   Same way with some others I looked at.  The High $$ MOTU's only have two and the new model is only MAC.    I only looked at units that had USB interface (or both USB and some other).
 
My requirements were more built in mic preamps so I didn't have many options.   But, so far I'm not sorry I bought the Studio-Capture.   
 
My budget was $1500 range. If I would have settled for the RME Fireface UC, I would have had to spend more than $1500 for extra mic preamps.   Nothing I found except the Studio-Capture ($999) fit what I wanted. 

I've been using my OC for almost 4 years and have had great success. You really can't go wrong with either device. It really comes down to what you want for features and price. I will say that no matter which choice you do make, Sweetwater has a 2 year return policy. Mine died just before the two years and they fixed it FOC! Looking back, It was my fault but they fixed it anyway.

fireberd
I replaced the Saffire Pro 40 with a Roland Octa-Capture.  The preamps were different but after using it for a while, I now have to say the Saffire Pro 40's preamps tended to slightly "color" the signal, where the Octa-Capture does not alter the input sounds.  For example, my Pedal Steel guitar signal (which is a "clean" signal - no effects or overdrive) tended to have a slight high freq roll off (like the Treble control on an amp was turned down) with the Saffire Pro 40.  With the Octa-Capture, what is recorded is exactly how the guitar sounds.  I also like the built in (user selectable) limiters and compressors in the Octa-Capture.  Also the Octa-Capture has reverb available for the monitor (not for recording) that the Saffire Pro 40 did not have.

Hi Jack,
 
I hear what you are saying about the highs dropping off on the Saffire, but what is the noise level/floor with the Roland pres?  After all, "clean" pres make a bigger difference as long as they are really clean.  Perhaps that is why you get a "wider" spectrum with Roland.
 
Please let us/me know.
 
Kind regards,
 
Living Room Rocker

In my use, noise level has not been an issue.  For me its non existent and I've never given it a thought.

fireberd
In my use, noise level has not been an issue.  For me its non existent and I've never given it a thought.

Hi Jack.  Thanks!  I appreciate your input.  You may have convinced me.  I am certainly reconsidering the Studio-Capture.
 
Kind regards,
 
Living Room Rocker
 
P.S.  Sorry for the delayed expression of my appreciation.

 I am really trying to decide on what to go for. The Roland Captures sound pretty good. I was wondering about  just one thing when I am getting a new audio interface that's rarely ever stated on the Focusrites or the Rolands. I have an LA610 and Twin Finity 710 Universal Audio Mic Pres, and do any of these audio interfaces have line inputs.  I am so stumped, I just don't know what to go for, 96 24 samples withe high end mic pres or 192 24 samples with just Roland mic pres. If any one knows about the line inputs on these units, please let me know. Thank you and rock on.
 

Eric, what's your budget?  Or are you set on getting a Roland unit?
 

 
 Well I was looking at the Roland Octa    capture or the Focusrite Safire 26/40 pro, so my range is in between 500 or 600 dollors.  Thanks for the reply.