I think that was to be expected, WAR has had, still has, and will have better DMG output than PLD, it's how they designed it. PLD (in theory) has staying power of WAR, which your test does show.
The question, I think, is more to whether PLD is now a viable replacement in a tanking role for WAR. The answer remains "no", Ifrit was the same fight on PLD, I did a bit more dmg than before, but for the most part it ran exactly the same on PLD. WAR was a slightly different story, first fight I wasn't prepared for how much of a difference in hate gen. there was gonna be. I saw my first SC land for ~150 dmg of course BLMs saw SC go off and started in on the beat down. I didn't have nearly the kind of hate we're used to, Ifrit turned. People had to hold back.
All told PLD worked far better in the end with just a little dmg reduction, just enough that I can mostly keep myself standing and we could trade a WHM for another DD (or just let a CNJ/WHM nuke most of the fight) it would more than offset WAR dmg output.
Edit: I was wearing full AF, everything else stayed the same. PLD: Unmelded Cobalt Winglet+Kite WAR: Unmelded Demilune Bhuj. Party make ups were your typical blmx5 whmx2 and me, or occasionally swapped a blm for a brd.