I used the 630 for awhile also, a few years ago.
The guitar sounds on the 2000 are outstanding! You'll want to throw rocks at that ol' 630.
Styles are much improved, with tasteful variations, fills and break. Choice of 3 intros and 3 endings.
Mic does not have XLR input, but the quality is really good. The vocal harmonizer is excellent. Mic has dedicated e.q., effects. noise gate and compressor.
Polyphony is much improved over the 630 as is the overall quality of the sounds.
It reads styles and songs very quickly from disk.
It's an outstanding value in my opinion.
DonM