A slightly shorter, "drop-in" adventures. However, note that you'll either need one additional monster book to cover the beasts that aren't in the DF RPG, or you can just swap out their entries on the wandering monster table for critters from the box set.
Very helpful - I was just looking at both of those adventures last night and wondering if they'd be good fits to my new DF box. :) Happy to try another Monster book too ... the one from DF is quite nice, but of course I want more.