Both games/series have a few similarities and enough differences to cover different target audiences. There is also a fierce rivalry between the two games, similar to the rivalry between Battlefield and Call of Duty. Both Wargaming’s “World of _” series and War Thunder are free-to-play and very enjoyable games, but they both require a lot of grinding to unlock more weapons of war to play with. If you’re looking for a free-to-play WWII-modern era tank, plane, and ship combat simulation game, then you have two main choices to pick from.