for starters all my experiences between PLD and WAR are strictly from PvE. as PvP is pretty much dead.impossible to get a match lol
i geared both exactly the same. save for the main and off-hand slots, but zofcourse. and reseted the bonus stats on PLD for STR. they both sit at AIL80.
PLD has 390 STR and 213 DET
WAR has 400 STR and 221 DET.
it's only a slight difference. but already WAR is more offensive.
test 1...
PLD kills 7 Lv50 Striking Dummies in 2minutes.
buffs/de-buffs used : Sword Oath
cross-class actions used : none
WAR kills 9 Lv50 Striking Dummies in 2minutes.
buffs/de-buffs used : Maim and Storm's Eye
cross-class actions used : none
test 2...
PLD kills 9 Lv50 Striking Dummies in 2minutes.
buffs/de-buffs used : Sword Oath and Fight or Flight.
cross-class actions used : Fracture and Mercy Stroke
WAR kills 13 Lv50 Striking Dummies in 2minutes.
buffs/de-buffs used : Defiance(only temporarily) Infuriate, Unchained and Berserk. Maim and Storm's Eye.
cross-class actions used : none
Unchained and Berserk was used separately.
the PLD is heavily defense focused. it has damage reduction from Shield Oath. and can block incoming physical attacks. plus you have the two buffs, Rampart and Sentinel. which reduce damage directly. and they don't just increase P.Defense like Foresight does. which PLD can also use Foresight. however WAR can not use either Rampart or Sentinel. if WAR could use those then it would upset their balance between defensive and offensive capabilities. which WAR excels at neither. while again, PLD excels at defense.
from personal experiences i have always felt the PLD to be lacking in damage. with the WAR being capable of a higher damage output. however NO tank role should ever be considered a viable source of damage when compared to any melee damage role.
P.S. maybe viable is the wrong word? lol :/