If you increase thrust both in an Airbus and a Boeing they will both increase their speed. A Boeing will pitch up to chase the trimmed speed (like a Cessna... pardon, I am still in training), an Airbus will keep flying straight ahead unless you order any change to your pitch angle. When everything returns to steady state, a Boeing will be flying at the trimmed flight in a climb and the Airbus will be flying straight and level but faster. Is that how the trim in an Airbus works?
Just curiosity.