The biggest difference is the lack of the chin spoiler on the lower front bumper on the TH (and the tow hooks). The other three trims are the same except the color of the front grill, roof racks, and mirror covers. The limited is the only one with the dual exhaust tips.
The TH has the red surround on the RENEGADE door badge and the trail rated badge has a bit of red as do the three tow hooks.
There are several wheel styles, but some are an option on multiple trims.