Comparing a 30FF Fantasie Helena Balcony Bra (7710) with a 32FF Freya Rio Balcony Bra (3510)
The band is pretty much the same in both bras. The 32FF bra has deeper cups than the 30FF bra, but they are about the same width.
The 30FF is 1 band smaller than the 32FF.
Helena Balcony Bra (7710)
Rio Balcony Bra (3510)