I got one more category to judge these games on:

Theme Song - Okay, so right off the bat let me just say that XIII should have kept their original Japanese song, if only because the lyrics fit the game better than My Hands did. The song feels out of place similar to FFXII's ending theme song. With that said, I'm not a fan of either version. Though the original Japanese fits better, like XII's it feels more like SE cramming a J-Pop ballad into the game for buzz appeal as opposed to making something unique for the game itself like Eyes on Me or Memories of Life. My issue being that XIII's original theme feels like a J-Pop song meant to play on the radio and sell albums.

XV is something I'm a bit more conflicted with. I love Stand by Me, and while Florence and Machine do a decent cover, I don't feel it does the original justice. I also have the issue of the song meshing with the title. Lyrically the song works perfect for FFXV and it's theme, but I feel that choosing a popular and well known pop song makes it feel out of place in the setting. On the other hand, I really love the expansions Comrades main theme Choosing Hope, which I honestly feel would have worked better as FFXV's Main Theme. Course I have a weakness for Gospel and Blues music, and this goes back to the fact that I felt Brotherhood's OST fit the world of FFXV a bit better than the music we got. Now some of you are probably wondering why I'm not pulling out Somnus since it was the game's original theme, but let's be honest here, that was Versus XIII's theme back when XV was suppose to be fantasy mafia. It's a nice theme but even it's implementation into the main game kind of feels like an afterthought. I'm edging this over to FFXV but if I had it my way, Final Fantasy would drop song/ballads from the series all together because they haven't been good since IX.