E4600

I bought my girlfriend a Canon EOS 400D a few months back and I'm impressed with every photo that comes out of it - but I recently wondered if that was just because I KNEW it was a good camera. How good is it really? I mean, my Sony Ericsson K800i has a FANTASTIC camera on it (considering its a phone) and the Nikon E4600 I have (and my girlfriend had before her 'upgrade') took great photo's considering its price and it was VERY rugged. How could I test this... So I took all 3 camera's out and took 2 sets of photo's with each camera. Guess who won?