Henni the two things I observed on "Carpenter" are:
-The Yamaha instrumental accompaniment is just as clear, but lower in volume compared to the Ketron.
-The VOCALS on the Yamaha aren't as clear. They sound like they might be over-processed with some kind of effects?

I'm not a pro and I don't sing. Plus I'm listening to this on crappy laptop speakers. So, FWIW. -Ted