A better way to compare might be to look at the top n stories over the past m days on the two sites, and see how much overlap there is. You can see the top rec

A better way to compare might be to look at the top n stories over the past m days on the two sites, and see how much overlap there is. You can see the top recent stories on HN at http://news.ycombinator.com/best http://news.ycombinator.com/best. Or you could just take snapshots of the two frontpages every 12 hours or so for a couple days.