I'unno, Warsong's(/Langrisser's) stuff is pretty different from what I've seen of vids (haven't bought it, yet, but soon), and from what I've seen of stats and whatnot SoW is way more Fire Emblem than Warsong... basically all the design I've seen so far that's not Ogre Battle leans Fire Emblem instead of Langrisser, really (which is arguably disappointing, 'cause I actually enjoyed playing the Langrisser stuff I've played more than the FE, heh). Map aesthetics and design, character interactions, just... all of it has struck me very much as later age (GBA and beyond, basically) FE more than anything Langrisser.
It's closest to Soul Nomad, if anybody has played that one, with some FE thrown in. Though Ogre Battle / Fire Emblem mix also works. Not as much langrisser. It's a pretty good game, and probably the only of its ilk that I feel like perma-death actually works well in - between each chapter you can hire more generics (with various ways to make them less green), and there are also better-trained mercenaries to hire. Story characters can't die, and if a character does die in a chapter they're only dead-dead if you can't get them revived before the end of the map (generally via taking them to a church).
Teams are built up like Ogre Battle, with various units filling slots on a grid, though position does not affect what attacks a unit uses. On the other hand, positioning matters more and different ways to go for the back lines matter more.
It also has its own innovations beyond FE and Ogre Battle, though -- there's a morale system, squad size isn't static, there's an ambush system for certain unit types, and instead of a weapon triangle it's basically an armor / armor piercing / magic soft triangle. (And ranged v. melee.)
Only thing I've sorta' seen from SoW that points Langrisser way is maybe the kinda' thirsty character sprites, if you squint at it a bit. Not sure if SoW is quite the literally-hired-a-porn-artist tier that Langrisser was, though, ha.
The portraits in the game definitely lean that way, but the artist is actually
someone at Riot games now (according to the lead dev). Granted one look at their art station shows you what they like to draw, hah.