well lets assume the rpm is as durable as the 3drc mount. with the rpm one you cant run a wheelie bar or metal skid plate, 2 requirements for me. the 3drc simple just doesn't break and will hold up to more abuse than it should while also keeping everything else on your car safe with zero compromises. period, end of story.
Personally I agree with the post above, I have had very good luck with the 3D-RC wing mounts on my talion and typhon 6s. However there is a guy at the track with a Talion and Typhon and has bronken mutiple stock and 3D-RC wing mounts. He is a little rough evidently. Anyway he went to the rpm wing mount and the last 2 weeks has not broken one yet on both cars.