Passenger comfort is very subjective, the size of your passenger is a large part of the equation. When I purchased my Tiger, my significant other was 5'-11" with very long legs. She did not get on with the Tiger's high step up passenger seat. She said it was like trying to hold on to a bar stool at 80 mph! I was looking for a sport touring bike with a flatter rider/passenger seat but the relationship ended before I found one.
My next passenger, (now Mrs. Gosling
), is just under 5'-3" and loves the Tiger's stepped seat. It gives her a view other than the back of my shoulders. The stock seat's passenger section did have her sliding into me so I installed a Seat Concepts cover and foam that has a level passenger section with anti slip vinyl on that part of the seat. Also, using a topbox with a back pad gives her a more secure feeling, she does not lean against it but likes to know it's there when I get a bit throttle happy.