Arduino boards may be purchased preassembled, or as do-it-yourself kits; at the same time, the hardware design information is available for those who would like to assemble an Arduino from scratch.” ...

The price difference between the two boards is minimal too, with the Nano available at $24.90 and the Uno at $27.60. ... Released in late 2012, the Micro is one of Arduino's small boards ...

There is no best out of the two. It all depends on what you want to do with the boards. The Arduino is a better choice for beginners because it is less advanced than the Raspberry Pi.

The Arduino UNO R4 Minima and the Arduino UNO R4 WiFi. But apart from the obvious wireless connectivity hinted by the name what other differences do the microcontrollers have.

The 32U4 in arduino-land can sometimes be a bit problematic with regards to firmware updating and reset issues, “brickable” as it were. The Nano footprint is quite nice (similar in size to a ...