I doubt you can tell the difference in photos from the Tamron SP 24-70mm f/2.8 Di VC USD G2 Lens vs ones from the Canon EF 24-70mm f/2.8L II USM Lens. However, your bank account will.
Flat out 1000% wrong
Tamron files completely fall apart at 100%. Its not even remotely in the same league as the version 2 24-70.
Get in a dark room and try to lock focus. Dare ya
Tamron is miserable to use