For me, I prefer the look of the 913h (it's what I currently have) the 913h.d is not the thing I need and I prefer to have a regular hybrid. But if you like to hit your hybrids on the tee, I'm sure that you would prefer the 913h.d. It's your choice but I hope I helped you to take a descision.

I'm having trouble posting pictures of the 18*Hd and 19*H I had theopportunity to compare for a full week during my last training camp.

Go on the link below to see the full comparison (pictures included:)

http://www.golfwrx.com/forums/topic/795667-titleist-913hreal-deal/page__st__30#entry6612961

The Hd is quite a bit less forgiving than the H and does flight the ball quite differently. If you tend to miss the center of the club, the Hd is not the best option. Also, flight wise, you would probably have to play a 21*H to get a similar ballflight to the 23* Hd (The Hd flies noticeably lower)

Hope this helps

For my game tho, the Hd is perfect and I can't wait to receive mine!!

Math

Got mine the other day. Looks great. 

Nice! Really like the "name" part on the shaft!!