Since I spend about an hour day travelling in hoping I hear a difference with AUX as well. Just switching from Spotify basic to premium was noticable so maybe this will be too.
I'm comparing it to my S7e this morning and gotta be honest, the S7e with the UHQ upscaler sounds really nice with nice detail and a deep low end. It may not be as detailed as the V20 but bass heads would likely prefer. The sound stage is wider on the V20 but there are no complaints with the S7e, it's sounds durned good.