I was thinking that too for fair comparison. Maybe the right term is 'showcase' instead of comparison. I'll try to record same songs on SD40 and E-A7, I don't have the PA900 anymore.
Thanks my friend.
Ketron SD90, Korg Pa1000,TC Helicon Play Electric, Fender Sonoran Guitar, vArranger, Bose L1 Compact, Aiwa Exos-9