Personally I just use an old kensington backpack with a "hybrid" notebook/binder with my samsung chromebook in a protective sleeve in the laptop slot and my books in the large pocket. Keeps it nice, secure, organized and never felt the need for anything more.
I can't think of anything that would have 2 slots/pockets for a laptop/tablet than again I haven't looked at these backpacks in years so things may have changed. But you may end up having to do what I do and just put them in the same area. And if you find a backpack you like but still want additional padding on the bottom for bumps when you put it down you can do what I did and use some styrofoam pellets neatly wrapped in an old cloth and stuff it in at the bottom of the area you put the laptop in.