Raspberry Pi Pico vs Raspberry Pi Pico W

The two boards side by side, from the same board files BoardPilot uses to check your wiring.

Raspberry Pi PicoRaspberry Pi Pico W
ChipRP2040RP2040
ProcessorDual-core Arm Cortex-M0+ at 133 MHz, 264 KB SRAM, 2 MB flashDual-core Arm Cortex-M0+ at 133 MHz, 264 KB SRAM, 2 MB flash, 2.4 GHz Wi-Fi and Bluetooth 5.2 (CYW43439)
Logic level3.3 V3.3 V
Header pins4343
GPIO pins2626
Analog inputs33
Default I2CSDA GP4, SCL GP5SDA GP4, SCL GP5
Default SPIMOSI GP19, MISO GP16, SCK GP18MOSI GP19, MISO GP16, SCK GP18
5 V tolerant inputsnono
Flashing toolpicotool (UF2)picotool (UF2)
Arduino boardrp2040:rp2040:rpipicorp2040:rp2040:rpipicow

Which one to pick?

Full pinout: Raspberry Pi Pico · Full pinout: Raspberry Pi Pico W