esp32 30 pin vs 38 pin

I went on AliExpress to buy an ESP32 module, I thought it was easy enough but I found a lot of different boards and nobody specifying the difference between each of them. The most common one are: ESP32 30 pins ESP32 38 pins ESP32 WROOM-32D ESP32 WROOM-32U NodeMCU ESP32S ESP32 CH9102X Could you please help me out? randers fc vs copenhagen