Canon 35mm F2 IS just post on Digital Picture

Canon 35mm F2 IS just post on Digital Picture,
You can compare with Sigma 35/1.4 which is better?!

Canon 35/2 IS vs sigma 35/1.4
http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=824&Camera=453&Sample=0&FLI=0&API=0&LensComp=829&CameraComp=453&SampleComp=0&FLIComp=0&APIComp=2