Hmmm, fun thread! Let me see if I can think of some.
I like the production on Death Magnetic... I've never had any problem with it.
I think The Breeders are way better than the Pixies. Pixies have some great ideas and I used to be really in awe of them, but I think at a closer look Francis is trying so hard to be quirky, that it becomes obnoxiously transparent. The Breeders are quirky as well but it seems like Kim either isn't trying as hard to be quirky, or she simply isn't as adept at it, because her music comes off as a lot more serious than Francis, even when she does a song that tries too hard, like When I Was a Painter.
I like Audioslave more than Soundgarden. Soundgarden for me was always just too traditional sounding. When I got into grunge, I already had an enormous classic rock collection and I liked grunge because it was something new for me. Soundgarden's more obvious classic rock influences worked against them and I found them more boring. That's also sort of how I feel about retro-rock bands. I do like The Black Crowes and Silvertide to an extent, but in my mind classic rock cannot be copied and any attempt to do so will result in failure. It had a special set of influences in the 60s & 70s, and anyone trying to recreate it outside of that bubble won't be able to hit the real nuances.