The other is later and a completely different group.
As for iPods and headphones, before I lost most of the hearing in my right ear, it would have been sitting with a coffee in my music room, with a full sound stage painted in music, coming from a quality pair of floor standers. These days, it is the same, but with headphones.
The source? Vinyl of course.
That said, my entire collection of Squarepusher (and others) is, by necessity, on CD.
Don't really regard it as such, there are so many variations.
The very early editions, complete, are worth a lot but mine is probably worth a couple of hundred quid. More than I would pay, but not exactly a retirement fund.
As for punk, I was huge into it from 76 for a few years, before it all got a bit formulaic. We used to go to a gig almost every night.