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Also the ESP8266 is smaller.

Practically, there's no difference for hobbyist stuff, but personally I mostly tend to use an ESP8266 just because using an ESP32 when I don't need the extra power feels like a waste, somehow.

esp8266 does not have bluetooth, the esp32 does and that is what makes it more more interesting.

Cheaper by €1? Who cares? Nobody here is manufacturing tens of thousands of devices.