Theoretical arranger question

[Koekepan]

OK, so I don't own an arranger.

The closest thing to an arranger that I own is actually a Casio, but I was curious about the capabilities of KORG's arrangers.

What I mostly make is ambient music.

I understand that KORG's arrangers all allow you to create your own styles. Could one make styles complete with pad automations and so on that would let one deliver an ambient soundscape, rather than something more beat-oriented?

Also, if there is a relevant feature-set (such as non-ROMpler synthesis) that one can only get at a certain level, what would that be? Or could one do the full crazy with a microArranger?