PARIS, Dec. 8, 2020 /PRNewswire/ -- The world's two leading auction houses have historically moved neck and neck, but online sales have allowed Sotheby's to gain a substantial advance over its rival. For the first 11 months of 2020, Sotheby's, now headed by Patrick Drahi, has a turnover lead of +40%. Such a wide gap hasn't been seen since 2004.

Glo...