General Breakdown of the CT.
As Sabre said a new setup is introduced each week that's usually semi-historical in nature. The planeset in AH is far from complete and the CM (the people who run things) do the best they can with the tools and resources available.
Radar settings vary from week to week but in general I would venture to say that Radar is toned down compared to the MA.
Icons are set so that friendlies appear at 6k (same as MA) but hostiles don't show up till 3k.
Those are the two biggies, if you show up during the times Sabre suggested you'll find many of the regulars on, and if you ask around people are generally eager to help out a CT newbie. If you see me online I'd be happy to answer any questions you might have.