They are both really good, just uberdata is cheaper. Talk to mainstream, they do a lot of uberdata tuning, $100 an hour if u want them to do it on the dyno.
Only thing im not sure of w/ uberdata is the vtec engagement. I would think you could change it w/ it but im not positive. Just talk to Vteckidd or better yet scttydb411, he actually does the uberdata tuning, they will be able to give u a better answer.