Sigma 85mm f1.4 vs Canon 85mm 1.8

I need your opinion.

Please check the site

http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=106&Camera=453&Sample=0&FLI=0&API=0&LensComp=756&CameraComp=453&SampleComp=0&FLIComp=0&APIComp=1

for a comparison.

No matter how I change things, the Sigma seems to be superior in terms of overall performance.

Can you please look and give me an opinion - is the Sigma really better than the Canin in terms of sharpness?