It is the same if I am using Piano or Live Guitar.

I will try to explain:

If I play part of a song With this 4 chords:

E (G#-B-E) - G#dim (G#-B-D) - A (A-C#-E) - C#dim (G-C#-E)

On the Genos, this will sound ok. On the SD90, it does not sound ok. Why the difference??

(If I play E - E7 - A - A7, which I Guess is more correct, then both sounds ok)