|I don't believe that this is a good comparison to make. Both cameras are entry level DSLR cameras and will likely be replaced by the user within, at least, 5 years.
As another poster has mentioned, the real question would be, Which series of DSLR Camera would it be best to be married to?
My opinion would have to be that Canon is the superior series of DSLR Cameras to be married to. Most pros use Canon and while it isn't always the best logic to say, "How could thousands of people be wrong?" In this one rare case, it is a fairly accurate statement to make. Pros tend to like Canon, because Canon makes exemplary equipment.