Paul,
The cateks work just fine for me on my Virus. I did try Burton physics on Virus as well but needless to say that cateks are far more solid and superior. On WCR I started with TD2s (should have started with what I know ((cateks)) as you did, but I was too lazy to take them off Virus) and I like TD2s too. I've only had 2 days on TD2 but I can't say I detect any major difference between cateks and bombers. Both are just solid, state of the art bindings.
One thing I noticed with Virus is that in the middle of the carve, you can shift your weight on the board and effectively change the turn into a tighter or a bigger one. With WCR I get "locked" in a turn with a determined radius and I have to commit to the turn as is. Again this may be just "me" and I am not an expert on this.
I ride 63/63 on Virus and 63/60 on WCR. The latter I might change since I've had only 2 days on them.