While in a degree I do agree that WAR have more arsenal for keeping group aggros over PLD, over months I've played both tanking jobs and I discovered their own strength/weaknesses, and use them to my advantage. PLD already has great arsenal of AOE aggro via Flash & Circle of Scorn which also add dots on mobs
Marking mobs for priority kill also a big plus. As for me, I realize later on that dungeons on pre-level 50 and post 50 plays quite differently. As for post lvl 50, learning to maintain aggro for groups even more important than ever. This is why I stopped marking mobs for some time, so that I can practice on aggro management better, especially if you wanna do speedruns.
And because of this, I find personally that PLD are better suited for speedrun stuff, once you have mastered maintaining aggro as groups. WAR could, but kinda bit complicated since their AOE aggro are conal instead of circular like PLD, that and having WAR literally as punching bag making they hurt more despite whatever total health point a WAR does have.
Again, there's no real preference over what tanking job best over what, so just experience both if you want and use whatever make you feel more comfortable based on strength/weaknesses of each tank jobs.
