I've done some work with Korg and Technics arranger keyboards and written styles for them.

At first they seem much better than BiaB styles, but that's deceiving:
  1. They repeat too often, you'll learn to recoginize this. Usually four measures in schemes like pattern numbers 1-2-1-3-1-2-1-4
  2. BiaB can store up to 400 patterns so that in the same situation different patterns can play. A probability tag can make the more common ones appear most often, and the ones with more 'personalty' surprise you once in a while
  3. Unlike BiaB the real-time arranger keyboards don't know what chord is coming next so there isn't a pattern to anticipate that. Simplest example: BiaB knows when you are going from a V7 chord to a I at the end of a part - and if the style is written correctly there will be one or more patterns to walk the bass down in various accepted ways. There are many different "masks" that can appear in musicaly appropriate places (at least in the all MIDI styles)
  4. The arranger keyboards I've worked with have had only 2 drum rolls, you can put dozens in BiaB


So at first take arranger keyboard styles sound better, but in the long run BiaB styles give you a much more interesting and musically correct output. This is especially true of the MIDI styles.

Insights and incites by Notes

Bob "Notes" Norton smile Norton Music
https://www.nortonmusic.com

100% MIDI Super-Styles recorded by live, pro, studio musicians for a live groove
& Fake Disks for MIDI and/or RealTracks