The band is pretty much the same in both bras. The 28DD bra has wider cups but they are both about the same depth.
Fuller Bust Bras Size 26-38 D-HH - Katherine Hamilton
Katherine Hamilton Bras
Fuller Bust Bras Size 26-38 D-HH - Katherine Hamilton
Sophia - Katherine Hamilton
Sophia - Katherine Hamilton
First Look: Katherine Hamilton Sophia 30G - Big Cup Little Cup
My Favorite Undergarments — Kathleen Post
Discovering Katherine Hamilton: Sophia (30GG & UK12)
Sophia - Katherine Hamilton
Sophia - Katherine Hamilton
Discovering Katherine Hamilton: Sophia (30GG & UK12)
28G in Cleo – What Bra Sizes Look Like