909 D2 Vs Speedline fast 10

[walfice]

I currently play a 909 D2 10.5 degree with stock stiff diamana blue board shaft which I hit ok (when fitted for it was told the launch angle was a touch low but not too much to worry about), but I've seen a great deal on a speedline fast 10, its 9.5 degrees with a stiff wasabi shaft (£79 / $125, it's listed as used but has just been on display in the store).  I have read that the speedlines go pretty high.  I am going to the store to hit it, its not an outdoor range,  just off a mat into one of those screens which show the ball flight but was wondering if anyone had any experience with both these drivers.  Would you expect the speedline to go slightly higher or much higher than the 909?