In 1982 I bought a British import 12-inch 45 reissue of the Beatles’ first Parlophone single, “Love Me Do.” Side 1 has the take with Andy White on drums. It was mastered from the original tape, and to me it sounds fab and gear.
Side 2 is the take with Ringo on drums, and it was mastered by necessity from a 1962 Parlophone 45. Compared to the first side it sounds like you’re playing it on speakers while wearing headphones that aren’t plugged in. It’s all explained here, in exhaustively delightful detail. Or is it delightfully exhaustive detail?