But literally unlimited style change live (because of seamless load style switching) and thanks to two style blending, in effect EIGHT Variations and eight fills and two breaks active at any one time - that’s quite the step up.
In case you missed it, Groovyband Live! (since 2018) has styles with NATIVE structure comprising 8 main variations, 8 fills and 2 breaks (as well as 3 intros and endings).
You can easily create your own custom variations by mixing patterns from other variations for each part, applying mutes, changing voices (including edits) and DSPs to every single part of each variation (or fill, break, intro, ending).
On top of this it has 8x2 OTSes, as well as seamless OTS switch. It also allows 2 series connected insert DSPs on all parts (on Genos and Montage who have enough DSP power).
It also has many other features that probably PA5X (and any other arranger) does not have. Everything editable in realtime from the touch UI.
Groovyband Live! plays on MODX/Montage and any other half-decent Yamaha arranger (PSR, Tyros, Genos), being an effective upgrade for those users.
There is also a clear and well written online manual which is responsive: it adapts to any screen size (by reorganizing the page layout) so that it can be read from smartphones to desktop monitors.
In one thing Groovyband Live! cannot compete: marketing money.