WDM vs. ASIO Audio Track Time Alignment ?

I am not able to clarify what the technical difference between the two are, just that out of personal experience that my (all up to now) Audio Interface(s) has behaved better and more stable inder ASIO.
None has behaved better than RME.
Others have to explain the technical side of it.
I ask again.. Why not try and see?
If it doesn't work for you, change back to WDM/KS.
All the best.

Hope someone comes along that can clarify the differences.
Best of luck.

What about my observation WRT the metronome?  Have you done any testing to see how much that might factor in...?   Is the metronome perfectly & consistently aligned?   If not, that's just as much of an issue in my eyes. 
 
I'm using S5 mostly, Sonar didn't introduce proper ASIO alignment until S6.  I did buy S6 but haven't installed it, not sure if I will as it does something screwy with LiveSynthPro. Last test-install I recently did S6 completely disabled LSP, as in broke it. Even after trying to re-install LSP wouldn't it wouldn't work any longer, not just in S6 but prior versions.
 
Maybe the reason I'm not sensing a problem is because I always record to the drums one track at a time.  I never reference to anything else so I don't get the cumulative effect.  Only vocals are ever cut to the music and those are not typically an alignment-critical "instrument".
 
I am quite curious now though about just how far off the tracks might be.
 
After all this reading I've been doing there is one common element that seems to surface: The buffers sample size seems to impact things.  Lower buffers can result in less delta WRT alignment problems.  
 
Sonic
 
 

I cannot answer your question about the metronome as I rarley will use it prefering to use a drum track to start a song. I have a bunch of my own patterns I dumped from my Roland 505. If not I'll use the step sequencer to make a simple Kick/Snare/hi hat pattern and drag it out. I find the metronome hard to play along with. 
 
I guess you could test the metronome in a loopback test. 
Using a loop back patch cord output to input record the metronome to an audio track, Zoom in and see if it's right on the time grid. 
Because your using such old versions and whatnot there's no point any of us testing because our results will be different.
 
 
Sorry to ask,, but Why are you not willing to update? Things have improved soooo much and myself I could never go back to any older version. The midi editing alone for me has been more than the ticket price. 
If it's a money reason Home Studio is only $50 and Artist $100. That's dirt cheap for what you get. 
 
At some point you'll no longer be able to function if you stay that far in the past. And it's hard for most people here to help you because we soon forget how things worked in the older versions. So one of the perks to keeping up to date with any software is the quality of help will be vastly improved.