What the difference?
If you want a real simple (and cheap, and strong) rear bumper, buy a 4x4 piece of square iron @ 60 inches long. Cut a little off so it looks like
_______________
\_____________/ and bolt it up where the bumperettes go, drill some holes in the bottom and bolt a factory tow bar onto. The walls on mine like this are 1/4" thick so it's REAL sturdy. I also made some plates with a D ring hanger that I bolted to the face of the bumper (ran the bolts through the bumper and to the frame moutned "L" shaped brackets on either side of the frame where the factory tow bar bolted up). Used all grade 8 bolts and you can pick the back of the jeep up off the ground with it (by the D rings), and you can also bash the entire left side of a Honda Accord in without even scratching your sheetmetal (maybe a little motivation for getting the back up lights fixed?). Total cost for iron, getting the corners cut off, grade 8 bolts, about $75 plus whatever the tow hitch costs (you could also bolt a 2" receiver hitch to the bottom of the bumper; that's what I'm gonna do on the wife's jeep). I'm gonna try and post pics so you guys can see the D ring brackets, but gotta get a camera.