The black War Horse has it's own new model.
You can find it for free in the Cheydinhal stables. He is only a tiny bit stronger and faster than the black and white horses.
But he has a lot of hitpoints and is also essential.

New model: The neck is much stronger and also less swan-necked. The back is longer, the croup is higher and so is the tail.
The whole body has a stronger build. The mouth has no animation though. I'm not able to animate or change animated meshes.

Extra: I left a sparkling unicorn around the stables. It has no purpose and is basically a deer. I put it in for testing, but left it there since the BSA is very tiny anyway.