I bought E60 last spring. Just recently purchased a Korg Pa 800 and gave the E 60 to my son.
Sequencer = good, better than Pa 800 because you can lay down backing in the record function then record your right hand part on any empty tracks (usually at least 8) or overdub on any in sequencer. E60 is limited in the editing in sequencer (such as effects, etc.)

style creator = easy to use, but is tricky to get the timing of drum or sound just right.

Sounds = Okay, but definitely not as good as the Pa 800. More shallow in E 60. (I have played accordion all my life, and the accordion sounds just suck on the E 60; the Pa 800 really shines here.)

styles = good on E 60, just not enough of them.

Keep in mind I'm comparing a mid-price-range keyboard (E 60) to a higher-end keyboard (Pa 800), and this is just my opinion. Bottom line = I love the Pa 800; in over four months with the E 60, I never "fell in love with it."