One thing that was unique about the 8-bit Arduino was that while the board itself was common for prototyping, it wasn't that hard to put an AVR chip on a breadboard for permanent projects or just for the sake of doing it and there were plenty of tutorials. There was even built-in support in the IDE for using an Arduino board as a ISP programmer for a raw chip by connecting a few wires.
With the Raspberry Pi, hardly anyone who used it would ever build their own/modify the design of the board itself.
One thing that was unique about the 8-bit Arduino was that while the board itself was common for prototyping, it wasn't that hard to put an AVR chip on a breadboard for permanent projects or just for the sake of doing it and there were plenty of tutorials. There was even built-in support in the IDE for using an Arduino board as a ISP programmer for a raw chip by connecting a few wires.
With the Raspberry Pi, hardly anyone who used it would ever build their own/modify the design of the board itself.