How do Canon and Nikon compare?

I am 14 and I really love photography so I am getting a Digital SLR. Could anyone give me some advice on which brad and model?

I am tossing up between Canon and Nikon and I need a camera that is good for a beginner but that wouldn't limit me as i am planning on learning new skills, taking courses, etc. Something under $600 (AUD) would is what I'm looking at, but I am going to Hong Kong soon, so I can get one cheaper there or in Duty Free.

If you could give me an un-bias opinion on both brands and tell me which you prefer as well as narrow down the model options and possibly recommend one in particular, I would be ever so grateful.
Added (1). At the moment I am leaning towards Canon as they have a good website and provide good courses, competitions, etc. What do you think of this?
Added (2). Also, what features are some of the most important that I should look out for in a camera.
Added (3). I will be using it to take creative photos of things around me such nature and the city in the day and night (so a camera that takes good pctures of city lights) as well as my family, friends and dog. I will take it on holidays as well in city environments and more 'wild'/natural environments.
I just want to be able to do great photography out of what I see everyday and learn new skills to do so.

Read more: How do Canon and Nikon compare?