Warrior ir rogue for pvp/pve

So u didn't do much pvp first time round side some on my enhancment shaman.

Hmmooking to level the warrior or rogue for pvp purposes.

Questions. How do both fare at lower gear levels, i mean I know both can be devastating at like high rank with pvp gear on, but how do both fare at like rank 4ish. Probably some dungeon/crafted blues or low end pvp stuff.

Should I level my enhancment shaman to one shot noobs hahaha.