That's a misprint. Royal Water is a Millesime only.
Creed doesn't make EDTs and Millesime versions of the same scent.
On the subject of Royal Water though, I sampled it very briefly and it didn't bowl me over-- but then some Creeds have taken me a few tries before getting hooked.
As for Creeds fragrances which ARE EDTs, I have several. I started out buying most of the MIllesimes, and then began to focus on the EDTs. The thing about the EDTs is most of them are from very different eras, so they might come as a bit of a shock to the nose if you're only used to the most recent Creeds. As for EDTs I have Acier Aluminium, Ambre Canelle, Bois de Cedrat, Epicea, Baie de Genievre, and Vetiver '48 (which is coming this week). These are all fragrances of very high quality, yet each one is anachronistic in its own way.