Are Christian Bale and Josh Brolin switched at birth ?

No.. It is that the movies industry has very specific and unchanged through time beauty/face standards and that is the reason why we see the same /similar faces come forward through time.

Yeah, I thought the exact same thing! I knew James Brolin is Josh Brolin's dad but I had to look up to see if he was also Christian Bale's dad! Their likeness is uncanny in this flick.