Generally an Extra is more 3d type plane. One of the main differences between a trainer and a sport plane is the response time to the controls and flying speed. The trainer is designed to be slow and laid back while the sport plane will respond instantly to your slightest stick movements and fly faster while it is doing it. The Extra is an extreme version of sport plane. An Extra stalls pretty easy and isn't very forgiving. It will not only do things your trainer can't do but do them in a blink of an eye. Its not a time to be guessing about what you did with the sticks or how to correct things. Coming from your trainer, this will most likely catch you off guard and get you in trouble "Extra Fast". I agree with going to a Tiger as a second plane. The plane has a good sized wing on it. This means when things get happening too much, too fast, you can slow the plane down and catch your breath without worrying about the plane suddenly stalling and spinning into the ground. Tigers at our club seem to stay with their pilots for years. Extras are usually gone after 1 or 2 seasons. :