I may be wrong but don't the 2000 and FP90 use the same keybed and Piano sound source ? The 2000 adds a second sound source for all the extra PCM sounds. And has more controller capabilities.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer