From what I understand,
Core web vital assessment (the top section of PageSpeed Insight result) uses field data and the lighthouse section uses lab data. And the core web vital assessment is what influences my search rankings.
Often metrics from the web vital are better than the lighthouse, for example, an LCP of 2.2s vs 4.2s. And lighthouse results are very inconsistent between Chrome with different locations/machines and one from PageSpeed Insight with the same throttle settings.
Which metrics are telling the truth? Core web vital or the lighthouse in PageInsight? Can I assume that the result from the lighthouse on my machine is different from the lighthouse in PageInsight due to the environment regardless of the same throttle settings? On my machine, most of the pages are 90+ when PageInsight's lighthouse shows less than 60.