As Diki said in a previous thread, a lot of these SMF were made using Roland gear, so adjustment is always necessary for optimum sound.

Yamaha has a an automatic re-voice, but that doesn't always work perfectly either.

I don't use commercial SMF files; just make my own for personal recording purposes, so I would certainly test these instruments differently.

The Audya has great percussion, but the rest just doesn't sizzle any more than the other two...I'm sure with a bit of editing they would all sound great (but still not alike), and one's personal preferences on how they would want/need the percussion to sound (as in "live" or CD-like) would be the deciding factor; and of course, the keyboard size as well.

The Audya certainly gives a much better account of itself in this comparison.