The T-Rex in JP looks A LOT better than the things in AOTC. Also, about the being in the dark thing, that’s called “the filmmakers being intelligent and using techniques to hide special effects”, like framing, color timing, grain structure, softness of image, contrast, light/dark in image, etc. And I’d like to add that my personal preference for watching JP is the 35mm print scan, because it includes all of the previously mentioned aspects of the film, which are not present on the home video releases (obviously).

EDIT: Here’s what that JP shot is supposed to look like.