WeAct Black Pill STM32F411CE vs Raspberry Pi Pico

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

	WeAct Black Pill STM32F411CE	Raspberry Pi Pico
Chip	STM32F411CE	RP2040
Processor	Arm Cortex-M4 with FPU at 100 MHz, 128 KB SRAM, 512 KB flash	Dual-core Arm Cortex-M0+ at 133 MHz, 264 KB SRAM, 2 MB flash
Logic level	3.3 V	3.3 V
Header pins	41	43
GPIO pins	34	26
Analog inputs	10	3
Default I2C	SDA B7, SCL B6	SDA GP4, SCL GP5
Default SPI	MOSI A7, MISO A6, SCK A5	MOSI GP19, MISO GP16, SCK GP18
5 V tolerant inputs	32 pins	no
Flashing tool	STM32CubeProgrammer / stlink / dfu-util	picotool (UF2)
Arduino board	STMicroelectronics:stm32:GenF4:pnum=BLACKPILL_F411CE,usb=CDCgen,upload_method=dfuMethod	rp2040:rp2040:rpipico

Which one to pick?

Pick the WeAct Black Pill STM32F411CE if you need more GPIO pins (34), more analog inputs (10).
Pick the Raspberry Pi Pico if you need the faster processor.