The 2nd wireframe image was of the high resolution mesh that was used to bake the normal maps. The first wireframe image is the low-res, in-game mesh. Both show n-gons, mainly because most modern game engines will automatically triangulate a model when it is imported. The main time you need to worry about that is if the engine triangulates it incorrectly and the surface shows triangulation artifacts. if it doesn't, it's fine.

Here's those images for those who don't want to have to navigate the site to see what we're talking about.


Low Poly


High Poly