Hi ,
sounds like the functions are almost the same between Genos and Sx 900.
Genos has more memory .
I don’t think the style creator differs between the two. To do any real in-depth editing, one needs external software.
Genos now has the chord looper and the style reset button.
Both have to use Yem for loading samples.
Genos has more sliders and knobs, and buttons.
Larger screen , but still works the same.
Better keybed with aftertouch.
Haven’t got a USB stick larger than 128 gig, it appears to work fine.
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best wishes
Rikki 🧸

Korg PA5X 88 note
SX900
Band in a Box 2022