The Rezound definitely has more bloat, but from what I've been reading, it doesn't hinder performance that much. I'm keeping my phone stock as well, and I was torn between the two devices. I even favored the screen on the Rezound when I finally saw both phones side-by-side. What finally sold me on the Nexus was being on Android 4.0 with no bloat. I figure if I don't like bloat on my PCs or Laptops, why would I want it on a phone...?
Bottom line, if you plan on staying stock, you really can't choose wrong here. That's my opinion though.