One thing I like with One Piece

[Totsuka No Tsurugi]

my bad LOL

 

[~The Norwegian~]

Phew, thx for the spoiler O_O

 

[Nikos150]

well since there is a spoiler warning it's your fault :/ , anyway i don't like comparing the animes, even though i also do believe one piece is better, but i don't think naruto , or the main characters are the strongest or that they never lose, it's just that you never get to see them fighting against stronger enemies, i mean STRONGER, like see naruto fighting against pain, but without sage mode naruto, that's what i consider difference in strength, pain might already be stronger than naruto at that point even with sage mode, but they didn't have much difference like they do in OP but that makes sense since people in OP are more endurable they can get beat up a lot and stay alive, but you can't show someone in naruto geting beat up a lot since there it's more realistic, if you remember some of them spent days and weeks in hospital after a battle... anyway i don't think you should judje those two animes in terms of battles cause they are way different...
if you want to judje them do it in terms of story where One Piece wins

 

[Boa Hancock]

Naruto was supposed to be strategic.

Then now it's like handseal speed don't matter.