[KaiserPro]

The ESP32 has deep sleep, but it uses about the same power as the pizero when running. The ESP32 is a really power hungry:

http://www.geekstips.com/wp-content/uploads/2017/10/esp32-po...

vs

https://raspi.tv/2017/how-much-power-does-pi-zero-w-use

Considering that he pi as way more ram, an SD card and a GPU, and is running 4 times as fast.

the important take away is that they have different use cases.

[zaarn]

Though it's important to keep in mind that deep sleep can fairly long, if you use external triggers, you can go days or months in inactivity, which saves A LOT of power.

Though I do agree it depends on your use case, if you're plugged into the wall, a Pi0 might be the better option.