What are the main differences between Polaroid film 600 and i-Type film?

The main differences between Polaroid film 600 and i-Type film are that Polaroid 600 film is compatible with older Polaroid cameras that have a built-in flash, while i-Type film is designed for newer Polaroid cameras that do not have a built-in flash and rely on external lighting. Additionally, i-Type film is slightly cheaper than Polaroid 600 film.