I have played with both quite a bit, and use the z myself. The z shafts are very low deflection, and put a lot of spin on the ball, but are not very forgiving in some ways. It only took me about a week to get used to the different diameter/taper, but I have really grown to love the smaller diameter. The overall adjustment period from the 314 to the z took a while, and there were some shots I had trouble with for months. Soft shots with center ball or below, and extreme left or right, will often masse because there is so much spin. I had to train myself to be much more accurate with tip placement, because a little extra english puts on a lot of extra spin, and can put the cue ball where you don't want it. I would reccomend finding a way to try them both. The 314 is a stiffer hit, and much closer to a regular shaft. If you do choose the z, be prepared to spend a lot of time and effort refining your accuracy in terms of speed control and tip placement. Either one will require an adjustment period if you don't currently use a low deflection shaft.