The Live Synth was very trebley. (Such a word?) It was very bright and sort of tinny.

The S/W Synth sounded awful muddy to me. Too much mid range.

The difference in the Yamaha just about blew me away, and there were lots of sounds that came out of hiding. I couldn't hear the string "hits" or the choir "oohs" at all with either of the other two. The bass was also a lot more prominent.