There seem to be two choices: Draw-Tite and Curt. I would probably choose the Draw-Tite, because the hitch mounts with bolts that are in shear, and doesn't rely on bent brackets to bear the weight. The Curt has bolts that mount thru double-bend brackets, from below, so they're in tension. The detail I don't have is what the "frame" is like at each of those mounting points. If it's the same thickness, and the same diameter bolts are used, then the shear mounting is stronger. All that said, the thing I don't like about the Draw-Tite is the round tube as the body of the hitch, instead of square tube. Just a personal preference -- haven't done the engineering. However, on my similar-vintage Suburban, the round-tube hitch was quickly pitched in favor of a 'traditional' square-tube hitch. This was based on gut instinct, and a conversation with the NHTSA investigator soon after I purchased the truck. Those hitches were almost recalled. Almost.
Back to Element hitches: Both items mentioned have identical ratings that exceed the capabilities of the Element. 350 tongue weight, 3500 towing. I might do the first one. I would not do the second.
I think the one on my Element is the Draw-Tite, because of the round tubes. Since I have a Suburban and a Class C RV, the Element is not top of the tow-vehicle list. It is, however, top of the to-be-towed-by-RV list...