Bones anwser fourthed and I guess to the Agori kind of seemed like the average villager and the glatorians where like the military I guess but anyway with their biology yeah they are more humanoid then Mechanicle, also some of them may have Mechanicle 'add ons' that they may have foraged them selves or scavenged from vehicles and such. Like that guy who was the skrall leader. And the Mechanicle residence of the MU most likely eat something that may restore energy or something and sleeping may also have the same effect for them. But here's a question I have, could the Matoran/Toa/Turaga have been modeled after the Bara Magna residence? Maybe that is why they had a similar build.