Differences between the RWD and the AWD?

I've been reading around here that the speaker systems are different between the Highland Model 3 RWD LR and the AWD. Is this true? I remember on the Tesla website in previous years, they'd delineate between a "premium cabin" and not or something like that. But now I can't find any listed differences between the cars besides range and acceleration. What are the differences between the RWD and the AWD that I should note?