When I owned earlier PSR's [2100], the drums were not stereo panned, or at least did not show any definition of the instruments in a stereo field..I doubt that has changed with the new models..They don't sound like they are different..

As for Stereo samples, I think Roland does have true stereo samples on the Fantom..I believe Yamaha relies on stereo effects to achieve the sound they are looking for...that is why the phase cancellation makes the Yamahas sound so poor..

Before you Yammie guys get all excited..go back and read that previous Yamaha owners agree with my statements..