I've had tanfo, cz, and 2011 open guns and as of now I'm on the 2011s just due to the after market. There is so much more out there for the 2011 than cz and tanfo. As for comparison, they all preform very well with minor and major loads. At this point I have had them all tunes to be pretty close to each other and it came down to how many parts I could get for each platform and the 2011 wins puth in that department.