- non-ballad styles are very realistic, especially 8beat/ 16beat. The guitar strumming is real. This is very important if you studio recording and you want your album not to sound coming from a keyboard but live instruments.

- sequencer

- flexibility

- oriental music support.

However, PSR9000 has newer updated sounds and the ballads are wonderful.

But that is my opinion and my work. Most users will prefer PSR9000PRO over any GEM. Therefore, you better listen to all keyboards yourself. If you really interested in GEM, wait for their newest keyboard... do not buy now.