It's not just the voices Bill. A long time ago I bought a full copy of StyleWorks XT. My favorite Yamaha styles converted fine for use on my Korg. Roland? Forget about it! And I wasn't surprised. If you look at the Yamaha reference manuals you'll see PAGES of parameters related to Style File Format (There are still other parameters which are not documented, but have been identified and can be manipulated by 3rd party software.) Roland doesn't have nearly as many. So for certain chords and transpositions, the styles will not sound the same. Yamaha, Korg, Ketron are all comparable in terms of the number of parameters and their complexity. Yamaha styles convert fairly well to Casio, too. Roland has the easiest chord fingering, but their style pattern transposition rules are crude by comparison and have improved little since the '90s.

Because of Yamaha's sales dominance, most hardware and software arrangers have a mode that emulates Yamaha's simplified chord fingering (in addition to full fingering.) Roland's fingering system is undeniably better-- more logical, more chord choices, and often easier to play-- but because Roland has sold so few arrangers in the last 10-12 years, it's often overlooked. The workaround as I described it, is to use the chord recognition engine in a Roland to send individual MIDI notes to the style engine of your preferred brand. An expensive proposition (and your living room ends up looking like a keyboard store!) Frankly, it's too bad that Yamaha doesn't make a module. Giglad comes close. And if they ever incorporated a faithful implementation of Roland's Chord Intelligence then I could replace two TOTL arrangers with a compact MIDI controller!