I've cleared the road at Mingo of tree limbs, some about 4 inches thick with the 1311 and the 911 both. The 1311 is fast and hits hard because of the speed and the length. The 911 seems heavier to me and I carry that in the Jeep because the longer blade doesn't fit between the seat and transmission tunnel without sticking out the back.

So what I am saying is that I personally don't feel as if it matters. Either blade will work and work well. MAYBE it comes down to weight. That is why I like the Leaner better.