Hi, love the Tesla's! I've listened a few times when I was on pure Tesla power and can't say I noticed any difference in the sound, knowing that the battery was on just fells nice.
By far the biggest impact is that I don't lose power at all when the grid goes down. Even though we have underground electric in my hood the power still would go out wreaking havoc on my smart home and IoT stuff. The Teslas have solved that stress and I can work from home with confidence. Check this screenshot of the Tesla app to see how wonky the grid is here, with the Tesla's, the clocks don't even have time to blink before I'm on battery.