>>7053819There are a lot of ways to differentiate the two. Different stub wings, different skids, the tail rotor is on the #1 side and whiskeys have it on the #2 side, the mast is a lot shorter, and fatter. The navy definitely fucked up in labeling this Marine bird. Trust me dude, I work on this platform for a living.
Pic related is a whiskey, you can spot the difference easily.