Here is an interesting set of measurements of popular "pro" headphones from McGill University that will send curvemeisters spinning.
Look at what they got from the MDR 7506. Compare that with the Bose. The slopes are so radically different that it is no wonder we are hearing absurdly high freq EQ and mastering treatment in some recordings.
On the other hand, one could question the measurement methods. You decide
Here it is.