The Arduino Nano and Uno are equipped with very similar processors (the chip that essentially serves as the brain of the board). The Nano features an ATmega328, while the Uno sports an ATmega328P.

The Nano Every processor has more program memory than the Nano — 48 kB compared to 32 kB. Similar jumps are seen in SRAM with the Every going up to 6 kB versus 2 kB from the older model.

If you would like to join the Arduino UNO R4 early access program the team is now looking for authors and ... projects based on an AVR Arduino boards such as the UNO R3, Mega, Leonardo, and Nano.

The Nano ESP32 supports both Micropython and Arduino programming languages, providing a clear path for those already familiar with one platform to easily switch back and forth as needed.

Ok, we’ll come clean. [Design Build Destroy] didn’t really add any memory to his Arduino Nano. But he did get about 1.5K more program space when compared to the stock setup.