I went through my blog and found pictures of the twins & Wyatt at one year old to compare to Carly at one year. As I looked at the twins' pictures, though, only the pictures of Logan looked like Carly to me. (Funny, I know, as they are identical.)
The twins and Carly, it appears, were made from the exact same mold of Josh + Shelly. Wyatt, however, has a different look. To me at least.
But I will let you be the judge: