Another few other things to think about.

Self-correction. Most aerobatic planes go exactly where you point them. Trainers are designed to have self-correcting factor built in. The dihedral of the wing will cause the wings to want to return to level. So if you have to plane banked all you need to do is release the aileron/rudder and the plane will return to level flight. On the aerobatic plane it will only return to level flight when YOU return it there.

Speed of controls. Aerobatic planes are designed to give you quick crisp movements when the controls are applied. This can cause overcontrol more than normal in these types of plane. The trainer is designed to be given gentle controls that give you time to see what's happening to the plane. And to be totally honest with you, most all new pilots will have major overcontrol problems with the trainer itself.

Speed of flight. You can slow the trainer down more than the aerobatic plane. I'm not talking about landing speed, but rather just regular air speed while flying. This gives the new pilot lots of time plan his next movements. One thing that is funny is that when you are training you think that the plane is flying so stinking fast, but later after you move on to other planes and you come back to your trainer you wonder how a plane can fly so SLOW!!!!!

If someone insists on trying to fly an aerobatic plane for their first plane I do have 2 great pieces of advice. First, bring along a large hefty bag to carry the plane home in. And second, put down the antenna on the transmitter. Because there is going to be a pretty spectacular crash coming and you don't want anything obstructing your view!!!!

Ken