I've been flying this thing for a few months now, and there are a few differences:
1. SOP > Cockpit Prep > Fuel Imbalance Limitations different from 'sharkless' 320's.
2. Radius of turn on the ground is 22.9m iso 22m.
3. Max X-wind for AUTO-ROLLOUT on a Cat 3 approach is 15kts iso 20kts.
4. New limits for contaminated runways
5. As mentioned, better climb gradient, BUT.... quote: "Improved performance on climb gradients and the takeoff flight path that result in an increase in the takeoff weight when obstacles or second segments limit the Maximum Take Off Weight (MTOW). The MTOW increase results in an increase of payload, or range, or in takeoff thrust reduction. For Turn Procedures, the flight path climb gradient will be different for A320 aircraft equipped with Sharklets than for A320 aircraft equipped with wingtips. Sharklets aircraft have higher climb gradient loss during turn than aircraft equipped with wingtips."
So, all of that stuff was from the books. Seat-of-the-pants feel when flying:
1. In cruise, it has a slightly rougher ride. Light lateral chops tend to cause more roll than a regular 320. The extra vertical surface area tends to make the aircraft roll a little more when it encounters a gust.
2. You can feel that the aircraft is a little more slippery, esp on the ILS. For example, 55t, 3deg slope, flaps 2, gear up, no wind... she tends to ACCELERATE! Standard 320's (esp at 55t or less) would decelerate or maintain their speed. You might need to drop the gear a second or two earlier to achieve your stabilization criteria.
3. Crosswind gusts at landing tend not to blow the nose into the wind, but push the whole aircraft off it's lateral path. i.e. it drifts further off the centerline with the wind and feels slightly 'wonky', but not too much.
You'd notice the difference the first couple of times you'd fly it, but you'll get used to it quite easily!