A bunch of reviews of the Clip Zip, that might help you:
http://forums.sandisk.com/t5/Sansa-Clip-Zip/Clip-Zip-Reviews/td-p/242614
Of course, the biggest change: the Zip has a larger screen and will display album art. Unfortunately, it doesn’t show on the main screen certain track playing information (e.g. elapsed time and track number in an album, present with the Clip+) , apart from the track progress bar.
The Zip is also a bit hardier than the earleir players (especially, the Clip). And it will handle mainstay aac files.
Some other additions with the Zip: time-of-day indication; “sports mode” with timer and lap time; fast alphabet scrolling in lists; menu customizability; an enhanced contemporary feel; an improved microSD card fit; and an improved EQ.
Personally, if I were getting a new player, I’d probably go for the Zip. Although I miss the on-screen track info. Why SanDisk dropped it, heaven knows (I guess it was the “aesthetic” of unobscured album art).
Hope this helps–
