Umm just HOW drastically different are these two jobs defensively, I'd really love to know. I mean my WAR can wear the exact same gear as my PLD and only have a small difference of about 25 defense just because of a shield and an extra defensive trait, definitely NOT a groundbreaking difference between the two without going all out double/triple melding a shield like you did.
PLD: WAR can use sentinel, sure its only 30% which pales in comparison to PLD's 50%.
WAR: Yeah WAR's Sentinel isn't quite up to stuff. Oh wait! Vengeance also gives WAR a 50% reduction so that's two damage mitigation abilities to cycle through!
PLD: Well, PLD can block 100% with divine Veil and on for 20 seconds, plus random blocks that negate.
WAR: Cool!
PLD: I still take roughly 50%~ of the full damage though.
WAR: Wait a minute! My WAR parries all the time too and I take maybe 0~20% of the damage.
PLD: Well PLD has Aegis Boon which totally negates magic and physical damage for one attack and heals me.
WAR: That's nice, WAR gets an ability called Foresight that Blocks any magical / physical attack.
PLD: I can heal myself too with Cure and Holy Succor.
WAR: Sweet! I have Bloodbath, Rampage, and Second Wind to heal myself.
I could go on, but I think my point stands there isn't any real game-breaking difference between the two jobs in the tank category.
And before you bring this point up again.
I refute that with"If a WAR is being a defensive tank, they're hurting their DPS considerably."
"The base damage of the weapon is the primary factor in damage and has the biggest influence in every DoWs overall capacity to deal damage. The attack that may be lost from stacking defense does not drastically effect WAR's DPS due to the limited conflicts between defensive and offensive stats in gear and materia. The fact WAR can stack it's VIT up to help both it's defense and physical damage only continues to give WAR an upper hand in this dilemma to make it both highly offensive and defensive."