I don't know how Kouros Eau D'Ete smells, but I had Kouros Cologne Sport Eau d'Ete (I think it is the "2003" edition). It was pretty much like Kouros but lighter. The KCSEdE didn't really have a citrus note from what I recall but something like an aquatic note... I think! Maybe I'll give KEdE a shot, the citrus sounds like an interesting twist.
Of the variants of Kouros (Body Kouros doesn't count), I like Kouros Fraicheur the best, with the citrus, amber and especially the vetiver. Good stuff.