Neither one of those are model Ys, and this is the model Y subforum (although a mod for this subforum will likely move it to model 3 where it goes).
With that being said, the mid range model 3 has the premium interior which includes premium audio. The SR+ does not include premium audio. The mid range was a limited time offer from tesla. It has all the features of a Long range tesla except for all wheel drive and range (fog lights, etc)
It also is a completely dead end platforum, that is unlikely to see any updates to things like range, etc via OTA updates, even though it still gets OTA updates just like other teslas.
The SR+ feature set is the one thats available from tesla (fewer speakers / partial premium audio, etc).