Dubois is playing on the top line with Panarin... I like his current situation better, but I don't like his situation if he loses the spot on the top line.
Beauvillier is on the 2nd line with Barzal, so not as good as Dubois current situation, but he has Barzal and Tavares as the top two centres... so he has the safer situation if NYI change lines around.
Higher Risk Higher Reward Keeper - Dubois
Lower Risk Lower Reward Keeper - Beauvillier
So depends on your risk level. If it was me I would take the higher upside in Dubois.