I just recently remembered all those movies I see in bins for sale are bootleg movies and other garbage (for the most part) and honestly I feel stupid for only now snapping back and remembering "Oh, those are bargain bins, right." Its such a random thing to forget.
My own answer is that it's because Quote and Curly were different robots, apart of the other soldiers. Sent for a certain mission, they probably would have more functions in their system and or the ability to think like a human.