Topic Rogue or Warrior PVE for MoP
Both rogues are warriors are top tier dps when it comes to PvE.
It's usually a choice of play style though comparing the two, rogues have a lower APM (actions per minite) due to their resource system is static and is consistently regenerating allowing for a kind of clockwork rotation to occur.
While warriors have a high APM and are a lot more erratic when it comes to resource generation as it's usage. Rage is generated via quite a few different sources mainly ms/bt hits, cs and ms/bt crits, white swings, shouts.
Overall though pick the class in which suits your play style best since that's the class you're most likely to do better in.