Woudn't it have been a better experiment if you had left them both with the manufacturers calibration? (And I can't tell by your wording if that's a calibration tool or the calibration itself) There's far to many variables in this experiment to get conclusive results; the calibration needs to be constant. More conclusive results would come from the default calibration because the screens differ.
Unfortunately, manufacturers calibration is awful, especially on the MBP 13" 9C9E : I was really disapointed just after openning the box!