Your friend is clearly not a Size Queen. One is much bigger than the other.

Now one of the Flight Deck who had come over to 777s told me that the crews fly all three 319/A320/A321. The A319 because it is smaller and lighter is more suceptible to wind on landing.

Now can I share something with you - I do prefer the Airbus product over the equivilant Boeing 737s. There - my secret is out!