https://www.gamesradar.com/sea-of-thieves-vs-skull-and-bones-which-pirate-game-is-right-for-you/

This article by Gamesradar is the best comparison to these two games. Skull & Bones focuses on graphics and just ship warfare, while Sea of Thieves includes treasure hunting and teamwork. I think both of the games will be awesome but I'm leaning more towards Sea of Thieves. Let me know what one you're thinking about buying in the comment section.