Board Thread:Naruto Discussions/@comment-5054236-20151006231226/@comment-4912646-20151006235415

It isn't Viz that changes the art, there have been differences between the weekly chapter releases and volume releases from as far back as Neji's battle with Kidōmaru. This can be for stuff like extending Obito's death scene or to fix art errors (which are plentiful toward the end of the series). As for the names, Viz has always used Ohtsutsuki (as well as Ohnoki for that matter), it's just a different way of romanising the name. Kaguzuchi is a weird one though, since Viz used to always change "Kagutsuchi" to "Flame Control" and it's a bit late to start using its proper name.