The humble ATmega328 microcontroller, usually packaged as an Arduino Uno, is the gateway drug for ... efficient class-E RF power amplifier with PWM for about 5W of output power.

But even after eliminating the Uno from your selection, you'll still be left with a wide array of Arduino boards to choose ... and D12. The PWM output pins on the two boards also differ, with ...

[Damian Peckett] has implemented an Apple ][, its 6502 processor, and a cassette port, all on an Arduino Uno. If that wasn’t enough, he also uses a PS/2 keyboard for input and outputs analog VGA.