its amusing that a site like digg which was fairly widely popular is now only as popular as a niche site like Hacker News. Don't get me wrong, Hacker News is, IMO far and away much better than either Digg or Reddit but both of those sites have much broader appeal. Digg shot themselves in the foot
Every site exhibits some kind of bias which appeals to a certain class of people making the site better in the eyes of that particular group.
Every reddit and 4chan user would tell you that their site is superior to every other similar site.
Generally, this is good for everyone.
There are many comparisons that could be made between different sites that share some traits, but which one is the best is not something you can quantify.
