My life would suck without you
It was again, a tough choice for me. Both have been pretty equal in usefulness in-game for me. I also don't mind both of their designs. Samurott got my vote though, because if they went head to head, Samurott could use Grass Knot for huge damage, while Carracosta could try Shell Smash, but Samurott could just finish it off with Aqua Jet then.