I've been wondering about this for a while
One of my old guildmates and I are very comprabable, both focusing on cleric and chaos warrior, within a level of two either way
due to tp's, her str was more than 200 above mine, while I had thrown all my tp's into 2hc, with whatever leftover dumping into life
I was doing nearly double the damage she was and missing very infrequently, so I can only imagine that training the weapon ability is signifigantly better than training the attribute
Of course, training 2hc doesn't help in any way with crafting, while str def. does