The Project X Flighted 6.0 is stiffer then the Modus3 Tour 120 S flex in the butt and middle part of the shaft. The Flighted 6.0 is even stiffer then the Modus 120 X flex in the butt and middle part of the shaft. The Project X Flighted 6.0 is a little more tip flexible then the Modus3 Tour 120 shafts. I do not currently have test data on the Modus3 Tour 120 R flex to know for sure just how much stiffer the Project X Flighted 6.0 shaft would be. The Modus3 Tour 120 is a slightly lighter weight shaft which could also help. The Modus 120 is listed as a mid/high kick point to produce a low/mid trajectory. The Project X Flighted was designed to produce a variable trajectory with a lower trajectory on the longer irons and higher trajectory on the shorter irons. The Modus 120 R flex should feel more flexible and possiby give you a little more distance. We reference an R flex for a 7 iron from 150 yards and S flex for an 8 iron from 150 yards.