Fortnite is more engaging than PUBG, many also prefer fortnite to PUBG because they believe fortnite is smooth unlike the early days of PUBG that were so buggy which in most cases halted the game and many ended up losing the game. Fortnite weekly updates on challenge, items, maps and event keeps the game exciting for streamers. Fortnite has doubled the views of PUBG on Twitch. It also has crazy views of YouTube. Fortnite is said to be easy, simply and smooth to play.
In conclusion, streamers prefer fortnite to PUBG because of the regular updates on fortnite and smooth nature of the game. All of these makes the game interesting for streamers.