My husband loves Indy. I can take it or leave it. Our oldest is the only one who's ridden as our others weren't tall enough. She doesn't love it, but I think it is the theme that scares her not the ride itself as she'll ride any coaster and do drop towers in a heartbeat (she went on the one at Great America by herself). Similarly she LOVES Guardians but disliked TOT. Guardians is more intense, but the theming is less scary. Our son has passed 46 inches finally so we'll be taking him on Indy next trip as he wants to try it out. But...I wouldn't be surprised if it is a one and done for him.
As far as height requirements, they sometimes vary on similar rides. This is especially true at non Disney parks like Six Flags where they have IDENTICAL rides with different requirements in So Cal vs Nor Cal.