Iria wrote this last year about relative scaling of damage, toughness, GR level, and paragon. Worth a look:
Yes, agreed. I think it’s very clear that WW is just hands down better at speeds, the question is really “by how much?”
In the near future I’ll try to run 10 each of 115s, 111s, 106s, and 103s, and get average times for each. I’ve been running 115s already, and the 111s, 106s, and 103s should correspond to your 115s, 110s, and 107s, respectively.