I didn't get much time to compare the older version with this "latest", but there are at least 2 games that never worked at all that are at least playable in this version, plus it's got support for high res. texture packs.
I'm interested in seeing Zelda OoT and Mario with nicer textures. The screenshots look mightt purdy.

All work and no play makes me..., well, you know the rest.