Different footprints - Warre's being much smaller.
Langs have frames, usually with foundation - Warre's have neither.
Warre's have a quilt box, Langs don't.
To enlarge a Warre, a box is nadired
beneath the existing boxes, with Langs extra boxes (whether broods or supers) are placed
above the existing boxes.
With Warre's, as the brood nest moves down the stack, honey is back-filled into the empty combs above it and is thus harvested from the top box. As a result of this, comb is constantly being created in the lower box, and removed from the top box - thus there is an on-going renewal of comb. With Langs, the brood comb has to be replaced every few years.
With Langs, inspections are typically made on a weekly basis, whereas with the Warre only two inspections are required during the year.
It would be much easier to list any one thing which is the same .... only there isn't anything. They are totally different forms of hive construction, and methods of keeping bees.
LJ