PS5 RDR Original - Remastered? Confused.

I just downloaded this after seeing it was available on the PlayStation plus subscription and was insanely excited. I downloaded the PS5 version (just under 10GB) and I'm not sure if this is the remastered version? At the same time the audio mix on this is terrible. I know it's adjustable; the music is so loud and a lot of the screens are incredibly dark. Is anybody experiencing this as well? Is the subscription version the same as the recently remastered version?