I can't see any new voices, but they must be there somewhere. For current owners of the high end PSRs, this is a complete nothingburger. I remember the PSR-2100, which was a minor incremental improvement on the PSR-2000. Even that keyboard had more new voices and features.

The increase in onboard styles seems to be modest, but these styles, if they're not already out there, will be available for free download soon. Unfortunately, even though a lot of R&D goes into the styles, it's hard to recoup.