Tyros 4 or psr s 910 has nothing to worry about.

Thnak Korg to put Yammy style 4 Variations, Chord sequener/More FX and graet harware and improved VH.But these guys are still missing the point .Korg styles (Long train running style sound the same as PA 50) in general still suck.

Wake up Korg! = If oyu can't fix your style department (more and more), you are not fixing anything.