Since the empeg doesn't have the MP3Pro encoder on it, a 64kbps MP3Pro file will sound like a 64kbps MP3 file.

The decoder is what makes it sound better than a normal MP3 file. I think they basically apply the same type of DSP effects that DFX does.

Personally, I think MP3Pro is pretty cool, especially for streaming applications (like Radio MX). But, overall, people aren't that impressed with it.