Comparing a 28E Cleo Kayla Balconnet Bra (9221) with a 28F Panache Cari Moulded Spacer Bra (7961)
The band is pretty much the same in both bras. The 28F bra has wider cups but they are both about the same depth.
The 28E is 1 cup smaller than the 28F.
Kayla Balconnet Bra (9221)
Cari Moulded Spacer Bra (7961)