I think its really hard to tell and eveyone always has a different opinion! (My husbands family just say they are both like hubby) At times I will take a picture and think OMG Ky looks just like Paul on this, I'll show Paul and he just can't see it!
-However think my son was a lot like DH when first born, he's still a mini Paul, but you can see me in him now when he's sulking or sleeping.
My daughter didn't look like any of us when first born! - Now she looks a lot like her brother. She's more like me than Paul, but you can see Paul when she smiles.