ESP32 vs. STM32: Which one is better?

Question

ESP32 Description
ESP32 is a series of low-cost, low-power systems on a chip microcontroller with integrated Wi-Fi and dual-mode Bluetooth. The ESP32 series employs either a Tensilica Xtensa LX6 microprocessor in both dual-core and single-core variations, or an Xtensa LX7 dual-core microprocessor, or a single-core RISC-V microprocessor and includes built-in antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules. ESP32 was created and developed by Espressif Systems, a Shanghai-based Chinese company, manufactured by TSMC using its 40 nm process. It is a successor to the ESP8266 microcontroller.

STM32 Description
STM32 is a family of microcontroller ICs based on the 32-bit RISC ARM Cortex-M3 3F, Cortex-M7F, Cortex-M4F, Cortex-M3, Cortex-M0+, and Cortex-M0 cores. STMicroelectronics licenses the ARM Processor IP from ARM Holdings. The ARM core designs have numerous configurable options, and ST chooses the individual configuration for each design. ST attaches its own peripherals to the core before converting the design into a silicon die. The following tables summarize the STM32 microcontroller families.

More details: https://www.utmel.com/components/esp32-vs-stm32-which-one-is-better?id=1383

Answer 1

It depends on the situation. I use both, but for different purposes.
First, the ESP32 has only 2-3 core variants, while the STM32 offers a wide range from 8-pin DIP models to BGA models with over 200 pins.
The advantage of the ESP32 is that WiFi and Bluetooth are readily available. This surpasses the STM32.
However, the ESP32 has too few I/Os, limiting the number of devices that can be connected externally.
In contrast, the STM32 has enough I/Os to easily connect to any device.
Clock speeds are fast enough for both devices, so there is no significant difference.
Next, we compare the development environments.
Both ESP32 and STM32 can be used with Arduino and mbed, so even beginners can easily introduce them.
However, for advanced development, the ESP32 does not have a development environment that satisfies professionals, while the STM32 has a highly functional development environment.
The device I recently developed used the STM32 for the main processing and the ESP32 for the wireless communication processing. In this case, it could have been built using only the STM32G series, but I could not obtain an STM32G, so I used both the ESP32 and STM32.
In this way, there is no one advantage over the other, but I feel that the STM32 has a slight advantage because of the richness of its lineup.