Image quality results have been added to the Tamron 35mm f/1.8 Di VC USD Lens Review.
Perhaps the most in-demand comparison is the Tamron 35mm f/1.8 Di VC vs. Canon 35mm f/2 IS Lens, this one showing both lenses placed under the microscope of the Canon EOS 5Ds R. The comparison is initialized at f/2, but any apertures can be compared. EOS 1Ds Mark III results are also available, allowing direct comparison with most other lenses in our database including the Sigma 35 Art Lens.
B&H has the Tamron 35mm f/1.8 Di VC USD Lens in stock.
Also just added are standardized product images for the Tamron 45mm f/1.8 Di VC USD Lens.
Lots of great comparisons can be made with these images. I'll get you started.