The V20 tune is definitely better than the V11... that was a POS. You, fortunately, never had to experience that version. V20 was a major upgrade in my car, since it updated the strategy code as well as the tune. Your car may be different. Whether it feels quicker, or provides more power (nowhere near 450 hp), will depend on many factors. Since you can't send log files you are limited by the canned aspect of the tune. If you choose to upgrade to V20, and don't like it, I doubt they will give you the option to go back to V10. If you're satisfied with V10 then stick with it until these freaks on this forum talk you into upgrading to bigger intercooler, bigger turbos, bigger HPFP, nitrous, E30, etc...