The discussion on TS9 and TS808 tubescreamer tone debates has been going on for years. There has been a wide variety of opinions and debates on the massive (or minuscule) sound/tone difference in between them. If you’re curious about the part differences between the two nearly-identical tube screamer circuits, a quick google search will provide a plethora of information.
You can also see my other video (https://www.youtube.com/watch?v=PH2uj9bWfM4&t) to see just how much an opamp does or does not change the sound nearly as much as many have been believing.
Comments from the beginning of the video were from various gear forums