Cwing the i series is the CW or constant weight. Better for higher swing speeds. Tip is stiffer and overall as well. The FC is for Flight Control, flighted tech to get the long irons up. Softer profile all around, better for a smooth or slower swing.
That being said I’ve fit ONE person in 3!years into a set and it’s because they asked.
We don’t offer the 95… seems all our graphite offerings other than 2 MMT shafts are lightweight. My guy at indoor golf had i95cw and I really liked them. But I’m hitting his 7 iron 175-180.