I have both BCI's and Dumerils boas. The Dum's boas tend to be more placid "lap snakes" when being handled but they do have their moments, and because they are naturally thicker than BCI's they tend to be heavier and stronger at the same length.

My larger adults all eat appropriately-sized rabbits of 1-1.5#. They could eat jumbo rats but I think boas do better on a lower-fat diet.

Also remember that Dum's prefer a lower temperature gradient - 75-85*F - so if you have a room specifically for reptiles the ambient will need to run a few degrees cooler than if you only had BCI's and ball pythons in it.