1) if the first one performs well, people are probably ignoring the second for being a dupe.
2) a source website's reputation, page load times, amount and type of advertising, and site design all factor into the popularity of a submission.
3) luck is a factor. just because something does better this friday night, doesn't mean that every friday night is a good time to submit. the first couple upvotes are crucial, and that's only one or two people - easily within any error margin.
4) maybe i'm totally wrong. this isn't a scientific analysis, just my general perceptions, and i've only actively been reading HN for a couple months.
1) I recognize that my one example is purely anecdotal, but this has happened to me, and I was submitter on both.
2) Either way, even if the performance of a submission is a function of the submitter rather than the URL, it contradicts what the GGP of this comment said, which is that it is a function of content.
1) if the first one performs well, people are probably ignoring the second for being a dupe.
2) a source website's reputation, page load times, amount and type of advertising, and site design all factor into the popularity of a submission.
3) luck is a factor. just because something does better this friday night, doesn't mean that every friday night is a good time to submit. the first couple upvotes are crucial, and that's only one or two people - easily within any error margin.
4) maybe i'm totally wrong. this isn't a scientific analysis, just my general perceptions, and i've only actively been reading HN for a couple months.