The 38GG bra has a bigger band than the 38G bra. The 38GG bra has wider cups but they are both about the same depth.
Envy Balconnet Bra
Panache Womens Women's Envy Balconnet Lace (7285) Bra, Chai, 28F US at Women's Clothing store
38GG - Panache » Envy Balconnet Bra (7285)
34GG - Panache » Envy Balconnet Bra (7285)
Envy Balconnet Bra
Panache Envy Full Cup Bra in Chestnut - Busted Bra Shop
Panache Envy Balcony Bra Black, 7285
Panache Women's Envy Stretch Lace Balconette Bra, Poppy Red, 28FF at Women's Clothing store
Panache Envy Balcony Bra Black, 7285
Panache Envy Balcony Bra Black, 7285