I was talking about relative size of foot to calf. My latest pair are size 44 so any measurements I take would probably mean little to someone named bigboi. IIRC, Forma and Gaerne fit exactly the same except that Forma are an inch or two taller, at least in my size. The only other brand I tried was Alpinestars but they were quite narrow so got returned.
I have had the opposite experience from Lemur with Gaerne and Forma. For me Gaernes are quite soft and require little break in. In not a very long time, they start to feel as soft as bedroom slippers. The soles are also softer which may give you better traction on the pegs. I find the Forma to be stiffer and require more break-in. The stiffer feel, even after break-in, makes them feel more protective. The harder soles also last longer. I'm on my second pair of Forma Boulder and have a pair of their adventure boots. All feel the same. These are the waterproof ones and I don't know if that makes a difference. I have had a number of pairs of Gaerne but don't remember what model.