Chosen Solution

Why is there $100 difference between the two screens?

Most likely the cheaper is an lcd disply and the other is an oled display.

About $100, sorry, couldn’t help it.

One is probably a off brand replacement and the other would probably be a manufacture made replacement. Otherwise, it might have to do with the quality of the display or what kind of display it is. if it isn’t that then one is just marked up more, or it is better quality. I have no way of knowing without having specs for each screen.