I don't know their differences BUT I've got a couple visors in the shop . My son sold the 48 and it didn't go with the car, I don't know if he ever tried to fit it to the 48.
The picts look a little different. One of ours has sturdier side mounting brackets. and stronger center bracket. One of ours is a universal fit type. It had a wide center piece that side pieces telescope into to fit various cars . they should be able to tell you the differences.