Hi RaCs: For me, the answer would depend on your Swing Speed (constant average not sunday best!), Average carry distance, your Smash factor, Angle of attack and Launch angle.
You'd have to get some time on Trackman or GC2 and hit quite a few balls to find out.
The shaft you are thinking of changing too will need a high-ish SS with optimum launch conditions to generate the current distance you get with the shaft you're using now. As it's a low-mid launch shaft, low torque, but to generate optimum distance you need a launch angle approximately around 13d.
What your normal Angle of Attack is will have a large bearing on it, if you have minus numbers here plus you don't generate your own average SS above 105mph, my take on it would be you might struggle to get your current distance. But if you have an average SS above that with a plus Angle of attack then it might work for you.
Average swing speed with a driver Cat 1 Amateurs around 105/106mph (despite what they might think they swing it at!)
At that speed for every minus degree downward attack angle with a driver off a tee you'll lose 7 yards of distance.
Basically you've really got to know your numbers at impact properly before you change shafts as if your just doing it on feel alone you could well waste a good deal of money you didn't need to spend on shafts.
Generally whatever you have now as your usual pattern of flight will to a large extent remain, changes to improve technique will have more of a change on flight patterns than shaft change in the majority of cases.
Cheers.
