@darth:
Weapons will have the same max level for everyone.
Since you have the playthrough time, another interesting category would be time to 100% (all trophies / achivements).
I think that would be the master category that shows who the best FFXIII player is (on VGChartz).
Looking forward to: FF Versus XIII / LBP2 / The Last Guardian / Yakuza 4 / ICO Collection