It may not mean much to some, but the narrower tire will perform better on every surface except mud and beach sand. There are more lbs/sq in with the narrow tall tire which will help it grip most surfaces including shale. I've found that to be true while wheeling in my ZJ w/10.5" wide 33s with a TJ w/12.5" wide 33s. Both were locked and aired down. Plus, it will roll withy less resistance on the road.
97 ZJ 5.2, Atlas, hp30, 8.8, alloys, locked F&R, Clayton LA lift, 35" KM2's
97 TJ 110" WB, Atlas, 350 chevy, D60, 14B, 42" Pit Bulls.