I have both those bikes and I would put in a vote for the Big Mama. In technical terrain it is just going to handle better because it has a laterally and torsionally stiffer frame.
These can be built to 26lbs in XC guise or AM-ed out like mine and that goes about 32lbs or so. The suspension is very tunable for feel. It handles tight stuff way better than the chain stay length would lead you to believe. It pedals very well also. Tons of tire clearance in the frame.
Bottom line is the frame rigidity though. it is miles better than a Dos Niner in that respect.
These can be built to 26lbs in XC guise or AM-ed out like mine and that goes about 32lbs or so. The suspension is very tunable for feel. It handles tight stuff way better than the chain stay length would lead you to believe. It pedals very well also. Tons of tire clearance in the frame.
Bottom line is the frame rigidity though. it is miles better than a Dos Niner in that respect.