I have played both and currently stream Fortnite. Both games have different mechanics really. PUBg is a lot slower with more realism with different attachments for guns; while Fortnite is fast paced with building mechanics included. Fortnite was definitely the game I was looking for because I used to be a big Rust player. I was always looking for a game that had the battle royal feel like H1Z1 and PUBg and to be able to build like Rust. This is just my opinion but I believe the Fortnite outclasses PUBg period.