There are a ton of what I’d call culturally significant bands for my generation (I’m 45 so solidly Gen X) that would be just about unheard of in the US outside of a pretty narrow demographic. Across a range of genres too. Stone Roses The Manics The Verve Ride Paul Weller The The Spiritualised The Charlatans Leftfield Portishead Massive Attack Joy Division I think ironically that the musical movements were the same. Gen X kids fed up of that overproduced 80’s sound and culture looking back to a time before where things were perceived as more authentic, and the music of the parents that they grew up with. This gave America bands like pearl jam, sonic youth, the pixies and the whole grunge thing with a lot of southern rock, Neil young, 13th floor elevators etc as the inspiration. In Britain it was more the British 60’s mod stuff like the small faces, the kinks and the Beatles that formed the bedrock of the sound. You can see it the fashion of the 90’s on both sides of the pond too. I think the main difference is the relative importance of the country music tradition on general musical tastes.