My take on the John Grads SR series sound vs the Audeze sound is that they are almost opposites. I consider my SR325is to be shelved up a bit with the flat part of the shelf starting a bit before 2000 Hz. I consider my LCD2 r2 to be shelved down a bit with the flat part of the shelf starting at about 2000 Hz.
When I EQ my SR325is I do a shelf EQ that lowers them a few dB from about 1700 Hz on.
When I EQ my LCD2 r2 I do a shelf EQ that rasies them a few dB from about 2000 Hz on.
My HD600 I consider to be right in the middle in that it doesn't sound shelved up or shelved down.
The Grado sounds forward and in your face. The HD600 is headphone neutral. The LCD2 sounds set back, the opposite of forward.