ADS-B height data logged by the flight tracking websites is basically a Flight Level (whether above or below the TA), in other words it's not corrected for QNH.
QNH in the early morning of yesterday at LEBL was 1016 from archive metar so 250 feet based on 1013 would put a/c about 80 feet higher at 330 feet but not sure about accuracy of ADS-B height data.
Maybe pitch up in 2 stages on GA a/c due initial TOGA and then max thrust due urgency?