I’m not gp but I also prefer the app for several reason, like being able to cast to the smart tube TV app which is also ad free and has sponsorblock, and for small UX things like certain gestures, like I can pull down on a video to go to theater mode whereas in the browser it refreshes the video page, and I like that the transitions between views don’t have a brief white screen but has a seamless transition that expands a videos thumbnail into the video view.

Otherwise the UI of ReVanced is basically identical, but both are ad free and have sponsorblock / return dislike but ReVanced feels smoother to use and there’s lots of customizable ReVanced settings in the app for tweaking things like haptics, downloads, hiding and showing various components like endcards, info cards, quick actions and related videos, shorts, etc.

Here’s a sample of all the options it has: https://imgur.com/a/gRdd5K0