This topic opens a few points to discuss. The 320 and 321 have different characteristics. These airplanes even differ with a change of engine. A V2500 will behave differently to a CFM, especially during autoland, the thrust off is different, the flare is different and I believe that this may be a contributary cause of some of the tailstrikes which have happened recently. Watch how the airplane autolands, watch where it touches down and how the spoiler activation pitch up affects the landing. Personally I prefer a CFM 321, it has better takeoff performance than a V2500-A1 320, it autolands better and still is fun to fly.