The orange Tour G 310 was much closer to 59 than the listed 63. I played it for a year and switched to Duel G 310 that is 64 and there is a big difference in flex. The Tour G is a lot more plush, I could crush OHBH, but could never the get my FH to work as well as the Duel G, same with first serve, returns, pick ups and volleys. Lead did not help either.I had the same experience and did not think it was much if any different than orange Vcore g 97 whatever it was called.
The HD actually feels crisper than the Tour G.