diff covers are pretty much diff covers as they will all do the job of protecting your diff pretty well. what i do like about the arb covers is that they have a unique fill plug with magnetic dip stick. this really comes in handy to do quick checks and helps pickup any metal that the magnetic drain plug doesn't.

 

Well even tho arb is almost $70 more a piece than riddler and $40 more a piece than psc. I'm getting the arb front bumper so I might as well get arb diff covers. It's only money :-)