Sounds to me that a kid who got accepted to Mudd, Cal, UCLA AND CMU SCS has the chops to academically and later professionally cut it anywhere.
Sounds to me that a kid who got accepted to Mudd, Cal, UCLA AND CMU SCS really really needs to look hard to find her tribe. Sounds like Mudd is basically made up of her tribe, with the option to branch out socially with the slightly different type of kids going to Pomona, Scripps, etc.
I would base this choice completely on where she feels she would be happy.