In the UK and europe the word
electronica usually refers to a specific sub genre of electronic music
(Like the word techno which is often mistaken to mean all electronic music).
Electronica is normally considered more intelligent than dance music. The music is about using technology to create unusual sounds, melodies and heavily processed drums (often in patterns where the same bar is never repeated requiring painstaking programming) These elements are crafted into an intricate and some times
emotive piece of music. The results are usually closer ambient or
experimental music than they are to dance music.
electronica is often elitist and the scene can come with some pretence. but there are some great electronica tracks out there.