The Arduino Nano and Raspberry Pi Pico have distinct ... unlike the Nano (you can refer to the Pico pinout guide to avoid confusion). The Nano and Pico do have some pinout similarities, though.

If you're looking at comparing the Raspberry Pi Pico to Arduino boards, though they're broadly similar, they use different programming languages and have different pinouts. Spec-wise, the Pico 2 W ...