I believe the big difference between the models is the drums--they seem a bit louder (hotter) on most keyboards other than Yamaha, while Yamaha's drums are a bit more subdued. Yamaha's individual instrument sounds, however, IMO, are more realistic. Donny hit the nail on the head--it's 99-percent performer--not the keyboard.
Cheers,
Gary
------------------
Travlin' Easy
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)