I personally prefer the manga because the importance of each scene is clearly emphasized and each attack in a fight scene seems so much more epic and devastating courtesy of the sound effects (i.e. wham, krak, smash, etc). I also like how in the manga none of the dialogue is lost on the reader due to poor pronunciation of low volume, etc. However, depending on the quality of the dub and animation anime can be really great too! Plus in the anime since many scenes consist mainly of dialogue, there are minutes of scenes which simply involve flipping from one characters face to another with their mouths moving.