The camera in every mac I’ve owned have been garbage. I don’t understand how the same company that produces the iPhone can release laptops with such useless cameras in them.
tldr the camera is not great. I suspect it's because it's recessed in the monitor behind glass in a way that it isn't on the iPad and it's getting some scattered light that wasn't accounted for.
The camera screenshots definitely looked worse but not terrible. Most of the time it will be compressed to hell for a videoconferencing app anyway.