I don't think that the question has yet been answered. Sky Cruiser wanted to know which one was easier and which one was harder.
Now the way I figure it is that the question is a bit of a loaded one. I see it as being easier to get into Canada and be able to work, but as the other PPRuners have stated, third world wages and heavily taxed income to boot.
The US on the other hand would provide WAY more opportunities, but the kicker is that it's a b1tch to get into the country and be able to legally work.
Having said all that I know I have not clearified the issue very much, but it will have to be up to you which one you decide to pursue.