They are really, really similar.
Nikon Pros - Lots of cool features and modes. 26X zoom (as compared to 20), 9 point focus, dual stabilization
Canon Pros - Plenty of features and modes...though maybe not as much as the Nikon - it's more than I've got now, runs on AA batteries, 20x zoom (which is great compared to the 4x I've had for years), place for an external flash, tilt and swivel screen, it's a Canon which I've always had good luck with and my printer is a Canon, I know people who have one and really like it, $10 cheaper....