No, I strongly doubt it. Kouros Fraicheur is its own scent, and I think the first to be released with the "Kouros" name after the original. It is indeed hard to find sometimes as it is old now and the original has stayed burning bright. It isn't aftershave and although I've got no insight into corporate YSL decisions or history, I strongly strongly doubt it is known as such.
I think it's just hard to find.