I think you really pulled the punch of the fighter in your last comparison of the two. The feats you picked for a 2 handed weapon fighter are pretty off IMO.
"Weapon Focus, Weapon Specialisation (Great Sword), Greater Weapon Focus, Greater Weapon Specialisation (Great Sword), Power Attack, Cleave, Blind-Fight, Combat Expertise, Dodge, Mobility, Spring Attack, Whirlwind Attack, Iron Will, Endurance, Diehard, Quick Draw, Improved Critical (Great Sword)"
to me a fighter is really going to look twice at die hard, iron will, endurance, quickdraw, blind fight, especially when there are things like great cleave, the TWF tree, improved trip etc... to pick from.
"Weapon Focus, Weapon Specialisation (Great Sword), Greater Weapon Focus, Greater Weapon Specialisation (Great Sword), Power Attack, Cleave, Blind-Fight, Combat Expertise, Dodge, Mobility, Spring Attack, Whirlwind Attack, Iron Will, Endurance, Diehard, Quick Draw, Improved Critical (Great Sword)"
to me a fighter is really going to look twice at die hard, iron will, endurance, quickdraw, blind fight, especially when there are things like great cleave, the TWF tree, improved trip etc... to pick from.