im surprised that your second set looks like something flyingmonk would make, but anyways. the feet texture looks like it lacks detail, its just stretch black and dark grey to me, i feel like you should add more detail to it like the chest and shin/thigh textures.
i would also like to talk about the elbows, the texture design is fine, but the coloring is a bit off, it's looks purple and it doesn't match with the rest of your set.
but anyways, this is an awesome set, especially for your 2nd one, keep up the excellent work dude!