Its a consumer DX model, and will not compare to the Canon 28-300mm L. More like a Tamron 18-270mm except overpriced. hopefully, its a better lens, in fact, it likely could not be worse.
It will absolutely blow the doors of the tamron 18-270, I actually bought that piece of rubbish tamron, what a steaming pile of excrement! very lucky i could swap it over for a real lens. If its anything like the current 18-200 it will be pretty awesome for what it is. a superzoom for a crop.