Face to face and In the flesh

Face to face adverb - Involving close contact; confronting each other.

In the flesh and face to face are semantically related. In some cases you can use "In the flesh" instead an adverb phrase "Face to face".

In the flesh adjective - An appearance carried out personally in someone else's physical presence.

Face to face and in the flesh are semantically related. Sometimes you can use "Face to face" instead an adverb phrase "In the flesh".