A couple of other lenses also cover 20 mm, mostly zooms - but none of them, except Sigma 18-35/1.8 for APS-C - also covers f/2.0
And f/2.0 is what Tokina offers, so I stick with "the 16-35/4 is not comparable to that Tokina"
And f/2.0 is what Tokina offers, so I stick with "the 16-35/4 is not comparable to that Tokina"