Which score is most reliable (and complete) to use when comparing different sites and pages to get a quick idea (e.g. between competitor websites without detailed analysis)?
I am asking because for the same page on the same site, the score is over 30 marks higher via Google Insights online, which leads me to believe that the official Chrome extension is more accurate (e.g. worse score).
Some of this has been addressed in detail before, but for the purposes of doing quick analysis — what accounts for the different PageSpeed scores?