The top picture in Who's Who is Abby at 7 1/2 Weeks. The bottom picture is Aaron at exactly 2 Weeks. When I finally got Abby's picture in this onesie they were farther apart in age than I had wanted for comparison pictures. I do still think they look a lot alike, though. And, yes, Aaron is skinnier than Abby and his feet are MUCH bigger. She may have tiny feet (though she didn't get those from me!) and he's definitely got big feet.