In my own non-scientific independent testing, my Zojirushi absolutely destroys my wife's Yeti if you value heat retention.
It's actually annoying how hot it keeps it. After a few hours, its still as hot as it was when it was poured.
The lid is what sucks on the Yeti. Its just a plastic lid so heat escapes. Its not vacuum sealed like the Zoji.
https://www.amazon.ca/Zojirushi-SM-K...s%2C186&sr=8-1