Not sure if you're referring to differences between the R1 and ZLE or differences between the shafts I tried in the R1 so I'll answer both ways to be safe.
The differences between the white vs purple:
-white had tighter dispersion and much lower ball flight. Was getting some pretty impressive roll out and rarely had "tailing" where a draw or fade just keeps drawing or fading forever rather than slowly decaying the spin. The quick in the White was much easier to time than the bullwhip like kick in the Purple. I will say the longest drives I hit overall with any head/shaft combo were with the Purple when I did time it right. The Kiyoshi White was the best combo I tried with the FUEL 60, then factory Aldila RIP Phenom-55 behind it and the Purple last.
The differences between the R1 w/ Kiyoshi White and the ZLE w/ FUEL or FUEL TS:
-DISTANCE: the ZLE w/ FUEL was only about 5-10 yards longer distance wise, but the difference maker was how the distance was achieved. The Kiyoshi White was rolling like 20 yards at the end to get there and the FUEL was carrying all but 5-8 yards of that distance. With how often it rains and my preference for carry over roll for accuracy sake that was an easy choice. The FUEL TS only added to that margin by another 5-8 yards since it does spin less, but also draws/fades less and instead comes off as more of a push/pull flight which still has me pondering the winner between the FUEL and FUEL TS.
-ACCURACY: the ZLE is quite a bit more forgiving than the R1 for me and that was consistent across 3 different shafts in the ZLE and 4 different shafts in the R1. Less loss of distance on heel/toe hits and those hits went straighter too. So the misses were more on line and the center hits were more accurate as well. The ZLE seems to hold a better line for me than the R1.
Overall I think it really came down to the difference in the balance point between the two. The R1 felt head heavy with all shaft and lengths tried. The ZLE felt more balanced while providing plenty of heft in the head to know where it is throughout the swing.
Hope this was helpful in some way.