Help me decide

Ghost Of Tsushima or Elden Ring ( I will get them both eventually). I'm a fairly casual gamer that just got a PS5 and has only played FC24 and Dragons Dogma 2. Currently there is also a summer sale going on where Elden Ring is is around $42 and Ghost Of Tsushima is still at $70. I can afford both games but $30 is a good amount. But Ghost Of Tsushima is co-op so I can play with my best friend but not on Elden Ring cuz it isn't crossplay. Please give me a mostly un biased opinion.**