They're both good, but it's situational. Are you planning on doing a lot of main tanking? PLD is (usually) superior. If you're planning on off-tanking or doing a lot of multiple-mob management, then WAR is the way to go. I'm biased, but as a career PLD I'd almost say our job is way easier than a WAR in general, since all we usually need to worry about is properly managing our defensive cooldowns (the bad PLDs will blow them all way too fast and not stagger them properly).

It's kind of fun as a personal challenge to see how you can try to up your DPS as a PLD while still maintaining good defense... toss on some STR accessories, go full 30 STR on your attributes if you're comfy, and definitely learn when to stance-dance.