If you can, play both.
They are both fantastic keyboards with a different approach.
Genos 2 is at least 2 years out ...
Long wait.
One way to approach it: If you like Yamaha and feel comfortable get the Genos.
If you need a change and a new challenge get the PA4X
You can't go wrong either way.
One thing to consider: there is a lot more support and free stuff for Yamaha.
Good Luck.
Keep us posted.
Eric