STW, four days ago.
http://singletrackworld.com/forum/topic/which-budget-beginner-dslr-d3100-vs-1100d
I’ve been told that the Nikon colours are more realistic but the Canon colours are more attractive. Both are about the same size.
If you can identify either camera’s output based on colour reproduction whilst shooting in full auto on a kit lens, I’ll eat my own shoes.
The Canon has a 2.7″ screen – Nikon has a 3″ screen
Who cares, you’ll be looking through the viewfinder rather than gazing at the screen 99% of the time when you’re taking shots.
Ordinarily I’d say that there’s little to differentiate a Canon and a Nikon dSLR at a given price point, and choice really boils down to personal preference; play with some in a shop and see what feels right and intuitive.
However, in your case I’d question whether a dSLR is the right choice for you (though without knowing more about your shooting it’d be hard to advise further). Getting away from full auto and learning to take control of your camera will make a far bigger difference to your photographs than any agonising over Canon vs Nikon dSLRs.