The band is pretty much the same in both bras. Even though both bras's cups are about the same width, the 34G bra has much deeper cups than the 36DDD bra.
Lightly Lined Perfect Coverage Bra - Soma
Gossard Super Smooth Moulded Wireless Plunge Bra Reviewed
Freya Women's Expression Underwire Plunge Bra, Natural Beige, 28D at Women's Clothing store
Comparing a Freya Fancies Plunge Bra (1011) with Gossard Glossies Moulded Bra (6271) in 32FF
Types of Bra & Bra Style Guide
Soma Bras: Invisible Comfort and Support - A Well Styled Life®
Freya Fancies Black Plunge Bra from Freya
Types of Bra & Bra Style Guide
Fancies Underwire Plunge Bra
Freya Fancies Underwire Plunge Bra - Natural Beige - Curvy Bras
Freya Fancies Underwire Plunge Bra - Black - Curvy Bras
Fancies Underwire Plunge Bra