Interesting...the Korg sounds are cleaner to me, the Yamaha fuller, warmer. The opposite has always seemed true to me in the recent past..could be the global eq settings as Donny mentioned.
My perception also but you can't go wrong with either. IF I were in the market I would choose the one with the best keybed and I think thats the KORG.
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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