The Amiga port uses a different piece of classical music as Frederick II's theme. Bach's "Goldberg Variations, 4th Variation" is normally used as the theme for Frederick, while the Amiga version uses Mozart's "Rondo Alla Turca" instead.
Gandhi's aggressiveness is set to 1 by the game (on a 1-10 scale). If an AI adopts Democracy as a government, the game notches their aggressiveness down by 2. However, aggressiveness is stored as a single byte value, ranging from 0-255, so if Gandhi adopts Democracy, his aggressiveness will roll under to 255. He very rapidly turns from peaceful to murderous, and will then attempt to acquire and build nukes at all costs. The developers have given Gandhi a preference for nukes in subsequent games as a running joke.