It's a lot more uneven than the other two. They dragged in a pretty diverse bunch to do the remixes, and while some are brilliant (Rjd2, Lyrics Born), others are disappointing (Postal Service, The Album Leaf). If you put all three albums on scramble, the tracks are more enjoyable than if you listen to the whole thing all the way through.
If you're trying to decide between buying something else and buying Verve Remixed 3, I'd recommend the "something else." This isn't a must-buy.