OK I don't know everything!
And there are also ppl I know like trainspotter and busy_child could help out here.
Sometimes dance music genres can be vague. Everybody has his/her own opinions what is trance, what is techno etc.
You can get a lot of info here.
It'll take too long to describe it myself.
Trance-
http://www.clubdjforum.com/trance.html
Techno-
http://www.clubdjforum.com/techno.html
drum & bass, jungle-
http://www.clubdjforum.com/jungle.html
House-
http://www.clubdjforum.com/house.html
As a summary, chill(out) is slower, more relaxed, softer beats, etc. etc. You can't really dance to it, but I suppose that's just me.
