How to find your climate zone/hardiness zone?

There seems confusion between climate zone and hardiness zone?

The following might be a good link to find plants that grow well in your area:

https://www.gardenia.net/plant-finder

But you need to know your hardiness zone (which I have literary found) as well as the climate zone which is where the problem starts?

But maybe someone here has some clue about it?

Hardiness zone is what everyone is used to referring to.
Sunset Climate is more like the EPA level 4 bioregions for the west coast and epa level 3 for the rest of USA.