When you say 320 do you mean the 18x20?
Replying to the these old posts:
Wow good summary. I kinda did at first too but then you figure out the convention and release history of the line.
The 2nd generation dark purple Phantom 100p didn't increase the beam width or change the angles of the overall box beam, that was just the 100Xs
If people still wanna confuse it, just include the Japanese Phantoms, or what they have of them. I think Japan is calling the 2nd gen update to the 20-22-20mm Pro 100 XR just the Phantom 100, not confusing at all....
TeXtreme×Twaronに加えATSを搭載することで、面剛性をアップし、高いコントロール性を実現。上部にスウィートエリアを拡大しスピードとパワー性能がアップした、フラットドライブで攻めるプレーヤー向け上級競技モデル。
princetennis.jp
The Resitex Tour grip is firmer than the Resipro. Dunno about the Durapro. You can feel the bevels more. Slightly less comfortable but still good. Kinda like a lightly textured smooth rubber with moderate tack. I prefer the ResiPro more but either is fine for me. I do like the idea and think I prefer the extra weight of it though.
Not sure if it'll matter anymore lol, but you can still get the 100X 305, the Resitex Tour grip weighs more than a standard synthetic replacement grip, basically like a true leather grip. You won't add much weight at all if you took it off and put leather. Part of the weird appeal if you wanna customise or take away weight.