https://twinfinite.net/2018/12/last-of-us-part-ii-sony-competition/
Naughty Dog is hard at work on The Last of Us: Part II and the latest issue of Weekly Famitsu included a brief interview with Art Director John Sweeney and Director of Communications Arne Meyer.
Asked whether they're playing games from other studios, both answered positively, and Meyer added that it often makes him realize new possibilities. When playing other teams' games they feel a bit of pressure to surpass them.
When the interviewer asked which games create that pressure Meyer explained that looking at God of War, Marvel's Spider-Man, and Horizon: Zero Dawn encourages him to strive to make The Last of Us: Part II an even better game.
Asked whether a sense of rivalry exists even among Sony Interactive Entertainment Worldwide studios, Meyer explained that a degree of competition does exist, but it's cooperative competition rather than rivalry. If another Sony studio achieves something wonderful, they can be asked "how did you do this?" and they will provide that information.