Overdue Three/Four Day Photo Comparison

Since Penn was born we've definitely noticed that he looks a lot like Tavin in his early days.  I meant to find a comparison photo a lot earlier than this, but I was just flipping through old pictures and found a great shot that I can tip on its side and you can really see the similarities in face shape and features and it just so happens they are holding their heads/mouths in very similar ways so it makes it pretty obvious.  Tavin is three days old and Penn is four days old.  Who do you think is who?  (It's a little obvious if you pay attention to the blog and have seen these pics before). =)