Mr. Warlock
The stock HD seat was OK for me but according to my wife, the stock pillon was not comfortable for any ride of any significants. For one thing the pillon is real cushy and places the passanger real high. The pillon is separate from the main seat so there is a little play from side to side, which my wife says made her feel unstable. The comfort level is pretty low as well. I know some of the guys recommend the Air Hawk 2 which I'm sure improves the comfort level but doesn't solve the stability problem and just puts the passenger even higher.
The Corbin DualTour is a one piece seat for two, which makes the ride for the passenger more centered and stable. My wife says that the level of improved comfort is monumental. Remember I said the comfort level of the stock seat was OK for me but when I sat on the Corbin you don't want to go back to the standard seat at all. (Big Improvement)
We are currently on a road trip and we have already ridden 4,000 on the Corbin seat, and we're riding daily. We are having the time of our lives and we are extremely comfortable.
You and I have the same color bike!
I hope this helps
Etudeguy