So, I’ve just been going through this. I had a budget of £120‐150.
Came down to Specialized Torch 2.0 with carbon sole v Northwave Sonic 2 with composite (carbon reinforced).
I previously had the Sonic 2s but the older model had a carbon sole.
Cost was neutral but in the end I went for the comfort of the Sonic 2s as they were more comfortable and this is really important to me and i cant quantify the difference in the sole.
I guess time will tell with my max power numbers - but I dont race crits so its more for personal satisfaction rather than competitive results.
In the meantime I know I’ll ride with comfort.