I tried it.
The only thing that was different was the texture - creamy. It's like you get the melty chocolate taste immediately without having to let it melt in your mouth.
But, other than that, nothing different. It still tastes like a Hershey bar. B says, "The air does nothing. Seems pointless." It reminded me of a 3 Musketeers.
Here's another review.
Which mentions another of Hershey's "pay for air" products. Since I wasn't impressed, I'm in no hurry.