Theyre quite different than STFs.
Bones 100s kinda just feel like your average run of the mill skate wheel, kinda like a wheel you would get that was made from a skate company that doesn't specialize in wheels (kinda like if you were to get wheels made by Deathwish, or Girl wheels or Habitat wheels, etc). They're just normal wheels, nothing special.
STFs on the other hand don't really feel like any wheel I have skated before. Really hard, plasticy feeling at first but that goes away in a few sessions, slide really good and slide real easily with little effort needed.