The similarities between two art works being auctioned next month by Christie’s and Sotheby’s in New York are striking. Both were created by the Austrian Expressionist Egon Schiele. And both once belonged to FritzGrünbaum, a Viennese cabaret performer whose large art collection wasinventoried by Nazi agents after he was sent to the Dachau concentration camp, where he died.But there is also a notable difference in the way the houses are handlingthe sales. Read more