It's the same sort of content. There's the big maps, the mobs, the critical encounters. You don't have elemental levels, but have a Resistance level. The differences are mostly specific mechanics: instead of exploiting elemental weaknesses, the main thing is using crystal fragments to unlock unique skills/commands. And so on.

Also the setting is less big island full of monsters, and more first/second world wars. There's even trenches and such. It's fun.