That raises an interesting point. Does MAX A/B go for a fixed but high deceleration rate in the rollout or does it take all the wheels to the point of triggering the ABS, i.e. what would happen with full manual braking? As there’s no credit for reverse, it would seem more likely to be the former. One wonders why this might be the case as RTO braking works the other way round, so it’s obviously possible. Maybe Boeing should add another position on the knob labelled “Absolutely, fully, completely MAX”, or just “11”.
The difference between dry MAX and manual distances might have some influence from the way brakes are applied after touchdown. MAX on the 777 is still quite smooth, compared with slamming on the anchors. (I’ve experimented on positioning flights...)