We will compare the EF-S 10-22mm f/3.5-4.5 USM with its Nikon equivalent: the Nikon AF-S DX Nikkor 10-24mm f/3.5-4.5G EDBoth lenses manage to keep the distortion lowThe Nikon lens is a little sharper ...

If you are able to carry another lens, then seriously consider a really wide-angle lens, like a 10-22mm or a 12-24mm lens. These superwides make eye-popping images out of cramped interiors.