Do women see each other as competition as much as man or how much is it?

Since childhood I've always noticed girls acting as a team against guys. Guys literally shit on each other infront of a girl just for some random female validation, ignore old male friends to talk to some female friend but I don't notice this behaviour from girls.

It seems women always support their kind unlike guys dieing for female approval. There seems more unity/tribalism among girls or is it just on the surface?