Hi,
just measured the keys on my KN7000, VA7 & 9000 pro, and they're all the same size. Actually the 9000 pro feels great.
(Sorry can't comment on the psr 2000 as I don't own one.)
best wishes
Rikki
_________________________
best wishes
Rikki 🧸

Korg PA5X 88 note
SX900
Band in a Box 2022