After ordering the Tamron SP AF 10-24mm F / 3.5-4.5 Di II LD Aspherical (IF) CANON mount and the CANON EF-S 10-22mm f / 3.5-4.5 USM, the first tests, the sharpness is really best on the Canon Autofocus less hesitant (and quieter), and checkpoint thanks to USM is a real plus, the constant length of the lens is also a plus in security. We regret the lack of sun visor, sold by gun purely amazing price for a piece of plastic, darken on compatible 3 or 4 times cheaper.
To sum up, I do not regret the price difference, Canon victory.
