Yeah that was kind of an awkward take down. Story is shorter and more stacked then Kim. I'm willing to bet he is stronger then Kim. Also with Kim's Judo he is hard to take down but Story did wrestle in college so I don't know who is harder to take down. Kim is listed as 3 inches taller but Story is a very strong man.
Is he stronger than Sonnen? Honestly i think Maia can take most people down when he is the relentless BJJ fighter and not the shit kickboxer.