You can't go wrong with either as far as quality of product. I have used both the Gen2 and Trans+ on my car and I like the Trans+/TT chip combo better for me. It's a very simple and very effective. The Gen2/FT chip will give you the maximum tuning potential at least from my experience, but I am not a tuning GURU nor am I green on tuning. My car just responded better with T+/TT combo. Good Luck choosing one.