A little off topic but when we traded in our Mountaineer for our Montana, the Montana had the MorRyde pin box. As I recall the height was about the same. The MAJOR difference was the chucking or lack there of! We didn't even get a mile down the road and we both noticed the difference that quickly. We're spoiled, our Suites came with the MorRyde on it, I wouldn't have it any other way. Get the MorRyde you won't regret it.
As far as height difference I'd get the MorRyde and deal with the difference later, if in fact there is any in the first place.
Dan