well according to the locals. The b4 is more nimble, requires less upgrades out of the box (none really), cheaper, more durable (some can be fixed with upgrades on the 210) and easier to find parts for locally. The durango is quite a bit heavier than the B4 and I have seen guys struggle to make jumps in the 17.5 class with the durango for the full 8 minutes. But that is our layout. Some tracks have easier jumps. Durango came out with a plastic chassis to lighten it up, but it seems to break rather easily and requires braces to help it out, thus more upgrades. With the b4 you get a full blown race buggy with out of the box, aside from the ball cups, lol. People say the front arms are weak, well only if you hit pipes, lol.