I recently just tried a couple of Lancome ones, and for me, Diorshow Waterproof both regular black and Blackout Waterproof are still #1.
I tried Lancome Hypnose Waterproof, Hypnose Doll Lashes, and L'EXTRÊME and all gave much less coverage than Dior.
While everyone complains about the diorshow brush, i found that I never have to scrape off excess mascara from the brush. With the lancome brushes, I'm always scraping stuff off, and then one side gets goopier than the other and clumps on my lashes.