Anyone with a MacBook or MacBook Pro can attest to the fact their battery last significantly longer using Safari vs Firefox or Chrome. Apple has numbers on the Safari page: https://www.apple.com/safari/
You can run EFF’s Panopticlick test for what browsers block (or don't block) regarding fingerprinting. Safari blocks or disguises several features that are used for fingerprinting; Chrome blocks nothing: https://panopticlick.eff.org/
Mozilla's arewefastyet.com used to show daily benchmark results for all major browser engines. Sadly, it ceased to include Safari after they scrapped the system in favor of a new one.
Do you have a source that shows how chromium/edge/firefox/etc are inferior to safari in this regard?