Much of the same activities and panels, though AnimeNEXT has a larger attendance since it's been around longer. As for this year, they are in a brand new location so can't really say what it will be like this year.
AnimeNEXT is much bigger than Zenkaikon ~ There are a lot more people and a wider range of dealers, artists and fans. So if you like a lot of people and a bigger con [ especially for those people who like really WEIRD fandoms ] AnimeNEXT is probably better for you.
Though I actually like smaller cons better than larger ones. They're more personal and not as overwhelming in my opinion. (:
But don't get me wrong, I went to AnimeNEXT this past year.... and it was awesome ; A ; <3
I suppose so~ Otakon was REALLY big... ;A ; IDK. I met a lot of people, but it just wasn't the same :T
Is it really classified in the same range as AnimeNEXT. That's actually really cool :'D I always thought it to be much smaller, but that must have been just me... I don't really take into account the numbers, considering there's always so many people in one place ~