Here's the thing...

MyGNR is the most "known" site. You type in "Guns N' Roses" into a search engine, and MyGNR shows up.

Because it's the most seen, it attracts a user group of casuals and trolls. So a large group of users are basically trolls and alot of the time the main base users change out within 6 to 12 months.

Here Today Gone To Hell is more catered to the diehards/purists and has a pretty regular group of people, but it's so incredibly censored by Jarmo, because it's basically an unofficial-official GN'R message board. Even the smallest things are censored.

You can try them out, but i've been around this stuff for WAY too many years (basically a decade), and I can tell you today that Evo is the best board that ever is, was or ever will be.