[Alpha]

Honestly, the gameplay is comparable. They kept the same overall style while creating a different concept in that each time you log in, the "dungeon" areas won't be 100% the same. Overall layout, similar, but monsters and what "rare" monsters you find are supposedly different. Like Serra said, they played up the 3D quite a bit as well with the deaths of enemies.

I'd rate the game worth getting as long as you don't mind being required to be connected to the internet in order to play. It is frustrating, but it is a good game overall.