PARIS — Why fight success? John Galliano’s fall couture collection for Dior was such a winner that his fans, as John tells it, were screaming for more. And that’s just what they got in the Dior collection he showed Tuesday — more drop-dead glamour, more fantasy, more of those exquisite Belle Epoque evening dresses that women will love to slip into — even if it’s only in their dreams. Here, one of the stunners in shimmering silk, dripping with pearls. For more on the Paris spring collections, see pages 4 to 7.