"Diff" or "Compare" Page

[johnwarden]

A version of our "top" page that shows:

1. The rank that each story has on the hntop page
2. A "change" icon like in this page: https://www.tiobe.com/tiobe-index/
3. An "overriden" or "rejected" section with stories in the HN top page but not the QN top page.
4. Comparative stats: average quality, average age, average attention, sitewide expected upvotes

The difference in sitewide expected upvotes would be one way to measure comparative value created. This would be the sum of (quality*expectedUpvotesAtRank) for all stories on the page. If an upvote is a proxy of value for users, this is a measure of "net value": value per unit of attention consumed.