I have recordings of myself on minidisk using both keyboards. I can't tell which is which when listening.
The recordings of the PA80 and X1 sound quite different, mainly because of the "live" drum sound.
Some day a company will get it all together in one package--great sounds, great styles, great operating system.
On the positive side, the worst keyboard on the market is much better, and lower in price, than the best one from just a few years ago.
DonM