I think both just cover up the problem you have in another thread with your ram. I would run a WD hitch setup correctly first before I ran anything else. With the right setup, you can literally jack the rear of the truck up with one. I had to spend some time with a tape messing with mine to get it right, but it works very well. If you still need help, folks I talked to with bags really like them and they WILL level your load if need be.
