@Moony with an actual account your reading history stays safe even if you clear your search history but with a guest account your reading history isn't safed forever after some time it might dissappear. For other stuff like editing comments I'm not sure if you can do that with a guest account but I don't think so because you create your name while making your comme t if I'm not mistaken and I don't think you get notifications if someone likes your comment. But yeah like de main difference is with an account you don't have to worry wether yoir reading history is still there or not.