Modern arrangers usually allow multiple different patterns for a style part which can be assigned to any chord, so you don't have to rely on the manipulation of one pattern to play other chords (Which can become boring), which is a lot easier than creating audio chords.
If you connect a computer (An iPad can also be used to a point) then you can play those VSTs directly from the arranger (You just set the Midi out for that track and style part) thus giving you the same as an audio style created using those VSTs, but more importantly it is easily modified if you feel like a change. (If you have a VST Host onboard than it is even easier)
Don't get me wrong, audio styles can be great, but the work involved to make them is extensive and beyond most users. (Which are mostly Home Hobby Players)
Just think, you have a style which you want top get a better guitar for and the onboard guitars don't cut it, so load the Real Guitar VST onto a computer and use a voice from there by just selecting the Midi program number for that voice, which is a lot easier than creating a new audio pattern.

Bill