I like the DeWalt better because it actually makes use of the space in the top. The Ridgid version has a panel covering the space that doesnt hinge down. You can remove it to make room for slightly taller stuff in the box itself, but you cant really store stuff in the space (the panel is not easy to remove and reinstall)
Unfortunately I had bought 1 of each of the Ridgid box before the DeWalts went on clearance, so I couldnt return them easily. So I have a full set of the Ridgid ones, a few XL DeWalts and 4 small DeWalts.