Naruto or Naruto Shippuden is better than Bleach.
Bleach's fillers are even consistant with the story.
The fillers make it obvious to the viewers that it is on a different storyline.
Naruto fillers follow a narrow story line whether it be from the manga or from extra stretched out stuff.
I think Naruto Shippuden makes fillers believable to a sense that it goes hand in hand with the manga.
As for Bleach, the way they ended the Azien Arc was too low quality. I thought they would have made it look better as opposed to the manga. The manga ended the arc better than the anime. The manga allows readers to put their own ferocious imagination to the story, the anime just decreases the intensity of the true action.
The only thing that I would think that makes Bleach better than Naruto, is the opening/ending music choices. Other than that, Naruto & Naruto Shippiden rocks sooo much.