I think Myersguy nails it. One addition: Manjaro comes packaged with a gui software installer/updater, endeavoros does not. Endeavoros pushes you to use pacman and yay.

I’ve used both. I was happy with manjaro for a long time, until I wasn’t. Manjaro fools you into thinking updating is like mint - click a button, poof done. And that’s just not what you do on an arch system. Eventually one of those updates tanks things and you don’t know how to fix it. Endeavor does a better job at teaching you - for example showing you the arch wiki news prior to update, automatically installing pacdiff and meld, giving you tools to handle the cache and old files, etc. All of this is accomplished on the welcome screen with buttons that fire off terminal commands - so it’s not sexy, but helps.