I'm gonna say Pixies for nostalgia reasons. Mom had a lot of Pixies playing around over the years and although I'm not super familiar with all their work (have Surfer Rosa and Bossanova...no Doolittle yet) I hold them in high regard as artists. Also, their cover of Wild Honey Pie is awesome and that helped win me over.
I've only recently started to listening to Nirvana so it's not really fair but I feel confident that in the long run I'm gonna always prefer the Pixies. I'll let you guys know if that changes.
