The Navy Wasp and the Army Scout are virtually the same aircraft.
The Wasp has four castor-wheels, (for moving it in and out of a Frigate's hangar), while the Scout has skids.
The Wasp has flotation canisters just below the rotor head, while the Scout doesn't.
There are a few detail differences regarding load-mounts and locations.
if you are calm and collected when all about you are going berserk - you've missed something important!