Quote and Curly are more Human-like in design than standard worker or soldier-type robots. Everyone thought that Quote was a Human with pale skin until Booster's big reveal. Whether Quote is a cyborg or not? I would very much doubt it. The paleness of his skin very much suggests that it is artificial.
You have a point there... As well, I didn't think about the definitions of robots and cyborgs. Sorry... How about this approach: Quote is a robot, but build with a lot of biological (well, non-metal) parts? I mean, I'm having hard to think that a piece of metal could jump four times his own lenght...
What I noticed the most with Quote's sprite was the long distance between his eyes. Far beyond normal human ones... When I had plans to draw a DM sprite comic, I had to make a custom sprite with his eyes two pixels more near each other to make him look more natural...
In the game context, though, vast lenghts between eyes sort of feel natural, but outside of the game and on the title screen, it's kinda visible.
