There I was going to go and write up a big ol' post comparing the new IE7 beta 3 and Firefox 2.0 beta 1 releases, and it turns out Scott Hanselman already did a great job of it.

For lots of detail and good review, see Scott's post. He covers RSS capabilities, the anti-phishing/anti-fraud capabilities (yay Scott! heh), usability, download functionality, and more. Well worth the read.