Save the World differs from Battle Royale in a few key aspects. The biggest difference is Save the World is PvE, while Battle Royale is primarily PvP, sometimes PvPvE. You’ll be fighting computer-controlled zombies in Save the World alongside your friends. In contrast, Battle Royale will pit you against other players. Sometimes there are computer-controlled enemies depending on the limited-time events. This gives an extra element of chaos to Battle Royale. In Save the World, you also have access to more structures, weapons, and resources among other things. Battle Royale has a rather small resource pool compared to Save the World. For example, you’re going to find many more materials in the latter. Some of the cosmetic items in Save the World aren’t compatible with Battle Royale, though. Most of the time the items are individual characters, which is why you won’t be seeing them in Battle Royale.