It will be very different between the two. There are certain aspects of Yamaha's that ARE miles ahead (SA, Mega Voice guitars, multipads), but there are aspects of Roland's that, IMO, give them the lead - Editing styles and songs, being able to quickly change a style's entire character and turn it into something fresh, a 'punchiness' to the drums that sounds a lot more live than Yamaha's, just to name a few.

We're seeing street prices on BK's down in the $850 range, and most of us (or many, anyway) have a controller keyboard, pedals, you name it.

Plus, as we've talked about for a while, a BK makes an ideal companion to a modern WS (MoXF, M3, FantomG etc.), adding full arranger capabilities to more contemporary keyboards with arps and loopers on them. The BK's MIDI implementation is way ahead of the Yamaha MOTL keyboards, so integration with a WS is a lot easier and more flexible....

It's the same old argument, in a new dress. Yamaha, Roland, Korg, Ketron... all very different, all do some things better than the others, some things worse, all sound pretty different, with a different 'philosophy' in the style parts (some leave more room for you, some do more for you).

In all honesty, comparing the BK to a PSR910 kind of misses the point. A BK compares (on paper, at least) very similarly to an E80 or G70, $3500+ keyboards in their day. For about $850 or so. It's NOT a Yamaha, it's not a Korg, it's not a Ketron. If you prefer those products in keyboard form, you are unlikely to change your mind just because this is a module.

Oh, hang on! IT'S A MODULE! So, all you have to compare it to is the big Audya, at what, $3000 MORE..?! Now it looks a LOT more like a bargain, doesn't it? Personally, for someone looking to ADD an arranger to either a WS of an arranger from another manufacturer, this can't be beat. As a standalone arranger for a keyboard player, well, it's more in the middle of the pack, with strong and weak points. Would it stack up against a PSR 910 module? Possibly, unless Yamaha do some magic to the MIDI implementation, or you just prefer the Yamaha 'sound'. But we all know Yamaha are never going to make one, so I guess Roland have the affordable arranger module field entirely to themselves...