User blog comment:JaczKotan/Reaper Forms/@comment-5124423-20120521172219

Basically, it's right that they all look alike. In the ending of Mass Effect 2 we see dozens of DIFFERENT Reapers which would give sense to the statement that the Reapers have features of the species they are made from. Unfortunately, there are just Sovereign-like Reapers in Mass Effect 3 with the only exception of Harbinger. The others are obviously 'lost in space'. If there weren't the destroyers either, it would be pretty boring fighting the actual Reaper forces, I think.