wow, an anime thread I can join? cool.

read both mangas, watched YYH (dual audio rips, which had their own problems), watched old HxH.
I really can't see how someone can compare them.

there are two (maybe three) decent plot elements in YYH, that's all. just three elements i can look back and say 'boy, that was cool'. I can recount more great moments in the first HxH saga.
if anything, YYH is similar to bleach (if you didn't know it already), from the plotline, the dragging nature, even some story beats (remember the Ichigo's hair?) and mostly because both of them are landmarks in visual appeal of shonen shows to female audiences.

I guess some people can say YYH is 'better' because it's more grounded in it's own world and doesn't invent more and more concepts. but that's entierly true, they still had the weird video games arc (oh, there's another great part there, make it four good bits, although this one was replicated by toriko). they still rushed the final arc and lost steam after the dark tournament.
the fights were the usual shonen fest, can't hold it against the show, that's just the genre.

I'm going to side with the popular opinion of gotwoot, and say that people who think YYH is better than HxH are delusional from nostalgia, or trying to pick a fight and flame an argument.