The difference between the keys, is the location of the hex machined into the key itself. That slight difference is what allows you to crank the t-bars up higher. Ford keys in a GM 1500 are pretty much just like aftermarket leveling keys. There is no key that rides better than another key, when you crank up the t-bars it changes your ride quality. And the higher you go the worse it gets, and the more drastic your steering, driveline, and suspension angles get....