I'm pretty sure it's higher, that's why going with a taller scope rail, taller rings, or the aftermarket AX cheekpiece from Anarchy Outdoors helps.
The AX was designed to be used with the tall scope rail and 1.5" rings to provide scope objective clearance with the top forend pic rail, so when you put the AX buttstock on an AT with low rail and low rings, the cheekpiece is way too high (at least for my skull).