Are you wondering about the 4 rib or 5?
The 4 rib are less prone to hydroplaning than the 5, but iirc the 5's are the 10ply rated version.
M/T makes a damn good tire, and always have. In fact, the best set of tires I've ever owned on a pickup were the M/T MTZ's. great riding, wearing, and not too terribly noisy. And they could handle some hellacious mud.