Nope, no diff. GenI and GenII hitches are the same. There are a few class IIIs available for the Montero. Here's the DrawTite (second one down) .

Here's the one I finally decided to get, Hidden Hitch 90324, since I will only be pulling a tent trailer, and I still have my pintle hitch for the really heavy stuff, if I ever need it. The price diff was also huge. Up here I paid $160 for the Hidden Hitch, and the frame mounted class III was over $300! If I could have chosen, I would've gotten the Curt Manuf classII, that NWTroop listed above. Its a little nicer than my HH, but I couldn't get it up here.

Phil