Hey OP! Current member of the Air Training Corps here.
It depends on the sqn you're joining, and whether or not they're close to facilities for flying, etc. Most wings (the sectors that sqns are divided into) have places that you can do all sorts of activities at, known as Regional Activity Centres (RACs).
Being in the Air Cadets isn't just about being subjected to death by powerpoint!! As the youth representative for the Royal Air Force, we do still do drill and parades, as well as shooting, first aid and fieldcraft - activities that the Army Cadets also do. A key difference between Air Cadets and Army Cadets, however, is obviously the experience you'll get. There are summer camps that are offered up that take you to various RAF Stations, allowing you to get a feel for what life in the RAF is like, and if you can, giving you the chance to get some more air experience flying under your belt which definitely looks good for an aviation company.
Of course it is up to you, but both youth corps do give you valuable skills that are looked on favourably by companies. Hope that helps, and feel free to message me if you have any other questions about the corps!