For self powered situations ...
Any set with a non standard dmg buff will favor Tanks slightly in comparison due to the higher scale.
The build up sets will favor Brutes.
The mitigation aspect rarely matters. If Brutes never die, does it matter if they never die 86% or 93% as never dying as tanks?
Run the tank and the brute on a team with a kin and 5 people running maneuvers and assault. Then see which one does better ...