As far as the cockpit goes, it's literally identical except for the displays, the gear handle (because of the displays), and removing a couple of overhead annunciator lights. That's why they're talking about reconfiguring an 800 sim's software to replicate the difference. All the other hardware (yoke, trim, stab cutout switches, etc) is exactly where it was in the NG, so it'd be a matter of loading a hybrid software package to make an NG sim fly like a Max sim for this specific training event.