The Titleist Version is slightly heavier with a little more torque.  You can compare the specs here:

http://www.fittingworks.com/TechnologyProcess/ShaftandGripInformation/ShaftDescriptions.aspx

I suspect the Titleist version is much cheaper an can…

I purchased the bag from Golfsmith by calling in and placing a custom order directly from Titleist. I believe the charge for embroidery was only $15, and you can choose from a few colors.

Fitting for the 910D is coming up.  Have hit a few versions and am so ready to get one set up for me.