Opinion:
If you gig, it’s the Pa4x, it’s a fantastic tool with a drive.
I do not own A Genos, but I have listened to it. It is one great keyboard for home or a show. It does not have the same drive as the Pa4x, no way. It has a lot of flourish and great instrument sounds, making it a very desirable keyboard. But it still like a Yamaha.
This not to say you can’t edit, or change your PA system and find what you want. It is about what you have decided was the best sound in a keyboard. Subjective!
It also depends on the type of music you favor. So why does Don Mason sound good no matter what keyboard he plays? Could be because of the type of music he plays, and he is a country boy? (smile)
I have a S975 and a Pa4x --- I keep going from one to the other trying to decide which to keep. I’ll sell either one, but, the S975 is my choice. You may not relate to what I am saying, but the S975 YAMAHA is gentle with beautiful sounds – without editing.
John C.