Korg - punchier/better drums / less 3rd party styles compared to Yammy / have individual drum sound editing including efx even in arranger mode/cheaper than yammy (even 750)/gtr mode/ chord seq/ only 4 efx blocks unlike pa3x( yet usable)/touch screen/workstation like sound and seq editing/96 mb PCM ram to load SOUNDS and styles /songbook which saves everything including transpose data/plays Mp3 (750 can't Only wave)



Yamaha - better RH solo voices - Sax/guitar/piano/ horns or acoustic sounds in general,
more avail styles /not so good hardware ( espically if you use wheels alot )n overall drums/ 950 will play audio styles /more simu efx / more 3rd party styles out there than other brands combined/ more user Pc software / also claiming IOS support with your iProduct /less power in sound and seq editing/64 mb mem to load SOUNDS and styles,have Wave play recording/950 will play mp 3 and also have transpose and tempo change function