Is the preference just a personal thing or is there a difference in the way they play? I will be buying one soon and there is very little information to help my decision. I have a Viking cue with the stock V-Pro as well as a Predator 314. I can pocket balls really well with the V-Pro (some days it feels like I am thinking them into the pocket) but the LD 314 makes it so much easier to move the cue ball around (almost like the cue ball knows where I want it to go) but I can't sink balls as well. Also, the finish could be quite a bit smoother and the insert does not fit the pin nearly as tightly as it should. The low deflection characteristics are impressive but it's not the shaft for me.
I only been playing seriously for less than 2 years but I am committed enough to go ahead and buy a shaft that I can keep, instead of trying to do a little better, I'd rather buy something I can use indefinitely.