Flying about 20 planes of the same kind make and model I must say that basically they all behave the same.
Same flap setting, same handling characteristics at similar mass. The noticeable differences come in little details.
E.g. seating position. There are planes you always think that you'll never find the correct seating position. Some make noises from the TRU (transformer rectifier units) during engine start. Some make a whistling noise until you climbe above 5'000 feet and the seals get into place.
These are the real differences I see.