Here's the difference between the 08 Model DH and DH DFC (I now have a 155 DH DFC and a 159 DH). The sidecut is the same on the boards, the difference lies in the top sheet from last year. The top sheet on the regular DH is a smooth surface while then top sheet on the DFC is actually a dual fiber. If you look at the DFC, it looks like it is pinstriped and the pinstrips actually are raised off the board giving you added traction and no need for a stomp if you use one. The board feels stronger when you are sliding rails and boxes and a little more solid on hits. I did use my buddies regular DH a few times (155), and I felt mine was a little stronger. And to asnwer why I have 2, I use the 155 for days in the park, which is almost every day, and the 159 for days of just cruising the slopes. Now I am not 110% sure about the 09 line, but I believe it is the same thing. My girlfriend has a Crush DFC from 2 years ago and the top sheet is identical to the regular Crush from that year, but as of last year, the DFC editions had different top sheets, and different color designs.