I really don't know what that means "classic beauty". if you mean someone that is a member of the "pretty people" of the world. The ones that get everything in life handed to them. The high maintenance, snobby, stuck up bitches? then girl next door every time.
I couldn't vote even if I did change the noun. Looking at classic beauty pictures a lot of them would be classified as a the girl next door look now and vice versa with the girl next door. But then again I'm going by media and Hollywood standards of what each is.
I'm obviously not a guy, but I feel like the classic beauty is more beautiful and classy, like Audrey Hepburn, Marilyn Monroe, Grace Kelley etc. and 'girl next-door' is more of an average girl with mediocre looks. In that case, if I were a guy I'd choose the classic beauty.