In other threads on this forum, most people who have or have had both recommend the 60 over the 120, but I can't remember why. Do a search and you should find what your looking for. Personally, I have the 60 I am presently working on. Setting up the quad flaps and running as OS 91 Surpass "thumper" engine. I don't think you can go wrong with either, however. Good luck!