I suspect that Dubois has more raw power, But AJ is a better overall fighter that can deliver his power better.
Yup. Dubois hits hard but doesn't quite have single shot power like Joshua showed against Ngannou - and Joshua has brutal combos as well... The only caveat is Joshua is a lot more careful about committing to full power punches like that - Dubois is more likely to take a chance on a big swing, Joshua's more likely to set it up or get the measure of his opponent before timing it.
I'd say Joshua, he's fought more quality opposition and had some impressive stoppages, especially when he puts his punches together.
I think the bodybuilder edges it in terms of overall power based on performances to date. That said Dubois has a better more powerful jab that I think is going to help decide this contest in Dubois' favour.