I think that part 2 has relatively better art work than part 1.But one thing has to be kept in mind about the art work; part 1 has more consistent good artwork while in part 2 some chapter are brilliant while other are just effortless crap,and the same goes for the anime.
But as an anime watcher,I think that the part 1 anime was better.It had better emotional theme(music,tune whatever you call it).The fights were also more enjoyable to watch and were not too over hyped(consistent good artwork)
In part 2 they used/played the same tunes over and over again,its pathetic.The fights,even though intriguing,over hyped to an extent.