The main - well, bar leds, very much only - difference between the Explorer pHAT and the Explorer HAT (pro) is the absence of the cap touch.
The explorerhat library is meant to recognise which Explorer flavour you have hooked up (by probing the devices on the i2c bus), so there is nothing particular for you to watch out for when reading any learning material made for the HAT, from a wiring point of view.
The main catch with (any) Explorer is that the 5v tolerant output operates through a darlington array, so some ‘traditional’ circuits may/would have to be reversed… quoting from the documentation:
Outputs, via ULN2003A: Explorer HAT/pHAT has a ULN2003A output driver. When you turn one of these outputs on ( logic HIGH ) it will sink current to ground. Be mindful of this when connecting to the output driver- you’ll need to connect your device to a voltage supply, and then to the output pin.