I have found the canon will give jpeg right out of the camera a great
balanced shot that needs almost nothing done to it.
its a 30d
my d 70 nikon I shoot nef and need to prosess a bit. at the end the nikon shots look to me to be stronger and more contrast , also very deep
the canon gets the mid tones like skin better.
for people i generaly like canon , for birds i tend to use nikon.
you should be fine with any of them as long as you have good lenses.
i have bad lenses and top line stuff and that will make up for any lacking
from the two of them.
optics..........
steve