ESP32 has integrated antenna and RF Barron, power amplifier, low noise amplifier, filter and supply Management module. The entire solution is the smallest PCB area. The board is 2.4 GHz dual-mode Wi-Fi and Bluetooth low power technology, with a wide range of safe, reliable and scalable applications for the TSMC 40nm chips, power and best RF features.
high-performance price ratio, small size, easy embedding to other products powerful, with the support of the LwIP protocol, support three modes: using AP, STA and AP and STA LUA program support, easy to develop
ESP8266 module ESP-201 with standard 2.54mm headers, making it almost breadboard friendly (alsmot as there as some pins that don't fit, but it can be fixed easily).
Like the ESP-01 but dislike the few IO ? look no more, don't bother with smd board and try this one.