The E/G needs translation software to read any other format (as do most arrangers) and the BK will be no different. As you are quite aware, much in Yamaha styles doesn't translate well to other arrangers, as the Mega-voice sounds don't translate well, and a few other things (those expression commands can be an issue, too) come over poorly.

But basically, IF a style has a decent E80 translation already, it should sound just as good on the BK. The beta tester said so far, only the E80's UPG's (Registrations) failed to be imported, which is usually the case until software can be developed to translate.

Don't go overboard with the E80 comparisons, though. The beta tester was primarily referring to style equivalency. The BK is STILL based more around the Preludes FEATURES (if not its' sound), so you get two UPR and one LWR Part, not the 3/2 of the E80, and no VH, etc..