Just looked at a screenshot. It's top down. It's a pretty minor difference. Iso games tend to be smaller maps with elements of verticality, fire Emblem maps imply verticality by terrain type sometimes but that's it.

I would recommend fire Emblem (or at least the most of them). The RPG elements of Fire Emblem are very different than most games. Characters die permanently and the overall roster ends up being way more than you can use at once so it's about picking a team and building them with a limited exp pool over the game