I've run both and love both.
The SX is undoubtedly the tougher of the two tires ... I've seen Boggers cut sidewalls. SX's also work good in all but the thickest mud.
Boggers on the other hand do lack a little side hill capability but it's not impossible to deal width , after running them for awhile you'll find you've altered your driving style and no longer notice it. They also suck up HP and don't do all that great if you can't spin them in hard the mud.
I think Boggers climb steep rocky hills better and look sweet
Boggers are also hard on drivetrain parts.