I wouldn't even bother thinking twice about a DF...personally.
The difference will be minimal, if any...probably not realistically noticeable to the vast majority of folks. Actually...I'd prefer the 911 over the DF, but that's just me. The 911 reminds me more of a Battle-Rat in size, which I think is more useful.
But...don't mind me...I'm just patiently waiting on the B-08 <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />
Point taken. Its more of the length and thickness I like.