Originally Posted by
cpach
Brakes will technically work with anything, but Shimano 10+ speed brake levers pull more cable than Sram or Campagnolo and so you get arguably excessive mechanical advantage if you use Sram/Campy levers with Shimano brakes, and will also have to run your pads with less clearance. This might feel acceptable, but be warned this is out of spec.
I thought Shimano's brake cable pull changed when the shift cables went under the tape, ie 2nd-gen 10s?