I can't remember the exact difference, but I know that they are different enough that I could barely see Orgasm on my skin, but I love Deep Throat. So, to me, they are definitely different enough.
Also, isn't one more peach-y and one more pink-y? Or maybe I'm wrong about that.
Edited to add that I personally only ended up buying one (Deep Throat) because of the lack of being able to see Orgasm on my skin.