Yes, it does look better in this particular shot. From this alone, it looks like the Canon has no advantages at all over the Sigma. Whether that's true or not, I don't know for sure. I would certainly buy the Sigma, if I didn't need different lenses and focal lengths at this time. I'm happy with both recent Sigma lenses I bought, but am selling one because I decided to go full frame and no longer like crop cameras.
As for f/1.4 lenses, I think I will sell my Rokinon 85mm at some point. On a full frame, I think I prefer the angle of view of 100mm, so maybe I will try the Canon 100mm f/2. I wish someone would make a 90 or 95mm f/1.4, but preferably f/1.0 or faster. Of course the price would be outrageous, the faster aperture it got. And if it had AF and IS luxuries, it would get even more pricey. I guess I'm the only one who wants something like that.