What is the difference between the curtain module hidden license plate and license plate flipper?

They differ in the work way. the curtain covered hidden license plate will make the plates become invisible by a shield, with a push a button. the unit will move the plate into position automatically.

While thelicense plate flipper isn't changing the plate for a different one it flips your plates up/Down out the way.
You can see clearly their difference from the work video.