I’m fairly certain that SW and ESB use the same opening source, only with different audio? Though color grading may be different on each. (Could be wrong about this)
I thought so too but after seeing this is really think Empire’s is slightly different, the Fox logo looks a bit thinner than SW’s, although it’s obviously meant to be the same thing. I’d love if somebody could check this and make some comparisons, it would be cool if each of the 3 original films had different Fox logos, cause it always bugged me a bit that Jedi has a different one than the other two