I, like many other HHH devotees loved the original Mrs. Alice Hydrangea print - but Nell has still managed to improve it. The print size has been scaled down a tad so the dress has a bit more depth from far away and the Hydrangeas are much more blue now than purple! The pattern is perfect for a Summer on the Cape.
Fleur fits true to size so I would not size down like you do for Ellie. I also think this is probably a bit more large bust friendly than other styles because of the halter tie neck but unfortunately I cannot vouch for this first hand.