Grapplers Quest vs. NAGA

Does anyone have a preference which they compete in? I've only competed in Grapplers Quest but there is a NAGA the 25th in Maryland and I'd like to check it out. I'm also wondering if they have a different ruleset, round times, etc... I'm really trying to build up my competition ranking so let me know people.

Naga is cool. I like Grapplers just because of their UFC affiliation but NAGA is just as good. Rules are pretty similar last time I checked. Also, NAGA has MMA as well.

is it true that grapplers quest has banned the lock-down? saying it's a type of heel hook?