Unfortunately, there's no place comparing them directly, you have to compare for yourself. The best place to see what SN does is on
www.shivworks.com -- the trailer for REM II shows him in action, the link to the trailer is right on the front page. If I remember right, you'll see his tight arc and relatively squarer body mechanics and lightning fast delivery. SN's strike might be the more instinctive movement if you haven't trained before. As for Ray, here's a video on Youtube:
http://www.youtube.com/watch?v=Om0U6Cr8Y18 he's the shorter guy. His style has changed significantly since then, but you can still see the straight jab (there's also arcing forehand strikes, ignore those and focus on the jab). Actually, here's a better one:
http://www.youtube.com/watch?v=hV5TfZBB1Lo Ray's nontelegraphic jab is unbelieveable. He lets you put on a helmet, tells you he's going to hit you in the face,
lets you put your hands up, and I still haven't seen anyone able to block it!