The 38DD's band is a lot longer than the 38E bra. While both bras have cups with similar depths, the 38DD has wider cups, which may change the fit entirely.
Cleo » Mimi Padded Balconnet Bra (8091)
Comparing a 32DD Cleo Marcie Balconnet Bra (6831) with a 32D Curvy
Cleo By Panache Marcie Balconette Wired Bra 6831 RRP £29.00
Cleo » Marcie Balconnet Bra (6831)
Cup and band way too small 38E - Cleo » Marcie Balconnet Bra (6831
Cleo By Panache Marcie Balcony Bra Non Padded Wired Balconette
38J - Cleo » Marcie Balconnet Bra (6831)
Cup and band way too small 38E - Cleo » Marcie Balconnet Bra (6831
Pictures for 38FF - Cleo » Marcie Balconnet Bra (6831)
Pictures for 38FF - Cleo » Marcie Balconnet Bra (6831)
28HH - Cleo » Marcie Balconnet Bra (6831)
Cleo By Panache Marcie Balcony Bra Non Padded Wired Balconette
Comparing a Cleo Marcie Balconnet Bra (6831) with Cleo Chloe (6601