I am currently taking a professional photography course. I suggest you sticking to Canons. As far as quality goes you can't get better, also they are all very user friendly.
If you are dead set on those 2 cameras (which I hope you might consider the Canons) you will be better off with the Nikon. That is the most comparable camera to the Canons.
If you do some homework, read reviews online as as go on youtube to find professional reviews on both the Canons and Nikons, it will help you decide which one works best for you.