Each new Roland, it seems like they massage the styles a LITTLE bit, so there may be a noticeable difference between the BK and a GW or Prelude. Plus, they now have a better Makeup Tools section (from OS2 on the GW) and a Cover Tools section on the BK, so massaging the styles to be even MORE the way YOU want them should be doable. I pretty much take for granted that I'm going to have to massage a ROM style anyway, so no biggie for me.

But if you expect Yamaha sound, or Ketron sound, or Korg sound, you are asking a bit much. Like asking one of THEM to sound like a Roland, if the truth be told. Each is its own thing....