IglooEater said:
This http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1116&Camera=979&Sample=0&FLI=3&API=0&LensComp=687&CameraComp=979&SampleComp=0&FLIComp=3&APIComp=0 would seem like a more logical comparison, no?
Yes, f/2.8
To my eyes the Canon is a little sharper in the center and the Tammy is a little better in the corners. Canon set the bar high with the II lens 5+ years ago and it appears Tamron has come very close in 2017. The significant focus breathing issues at portrait distances (detailed in Dustin Abbott's review) might be a concern for portrait photographers however.