The SO 100T head is thinner than their 80T; the 100T is basically the same as the Matco 88 and Gearwrench 90T, which are about the thinnest heads. Oh, Tekton 90T, and the Olsa/SK 90T are also about the same.
The reality is that a theoretical chart is mostly useless because backdrag, etc, can play a large role. If you look at the PF tests, the 90T Gearwrench does as well, or better, than the 120T in his arc-swing test; and the 90T head is thinner; and the anvil fails at about the same torque for both of the GW. So, in that case, the 120T seems to be just a marketing thing. The same may be true with the SO 100T, but at least it's thinner than the 80T





