Here are a few differences between the BK7m and the BK5..
EDIT
The difference some folks think they hear, could be the "master tools" settings, and default effects...
I am sure most folks do not know the drums are different between the two models....The BK7m are taken from the G70..The BK5 are from the E80...
The kits sound better on the BK5 because it has the 5 or 6 "new" series drum kits...(new pop, new rock new brush perc etc)..
The tones are from the E80 on both models...
Both models have the "make up tools"...but the BK7m has the "covers" for SMF and styles.....Don't know why they dropped the covers on the BK5..it is a quick realtime change tool.
Did you take a look in at the settings of each Master Tools, Fran? Are you guessing they are different, or do you know?
I can assure everybody that there ARE the E80 drumkits in a BK-7m (you must have missed them somehow, Fran) including the New Pop, New Folk, New BrushPop, NewPBrushPerc, New Pop Perc, New Rock, plus several more ethnic kits. They aren't in the Manual, which is why you need to actually MESS with them a bit, Fran! v1.06 update added a couple of Greek Kits, too.
These new kits are one of the primary reasons I got this unit. They push the styles from already being lively into new dimensions of great feel and exceptional liveness.
Until I get them side by side, I guess I am just going to have to guess, but if I were a betting man, having had the G600 and the G1000 next to each other back in the old days, I would guess that Roland are doing their usual trick (and most manufacturers do this too) of squeezing the compression harder on the samples (more samples in less memory, shorter loops, less multisamples) and using lower price and quality D/A converters on BOTL gear. On IDENTICAL patches on the G600 compared to the G1000, there was a noticeable drop in sound quality, a sort of 'brittleness' and lack of 'life' and whole styles felt brighter and thinner.... Just a hair, but noticeable, nonetheless.
I guess, with the BK-5 and BK-7m being comparably priced, Roland had to cut SOMETHING to add speakers, a keybed and a full case. But I am sad to hear it is the sound quality. And the Cover Tools. I find these of great value squeezing extra mileage out of styles with the minimum of effort. Thank God they didn't drop the Makeup Tools is all I can say!
Oh well...