There are two systems out right now and they are actually working together to have the same platforms to play on. Basically PlayStation and Xbox are going to be ably to play together. There are people who think one system is better than the other and while they are are both good, PlayStation has everything that Xbox has, but PlayStation has even more to offer. For example, PlayStation has better games that can be only played on the PS4 and then the PlayStation has a pro version  which is even better and even faster. The PS4 Pro has 1 Tb of storage and is Capable of playing in 4k. Then theXbox one x has the same thing but it costs more then the ps4 pro, making it less attractive.