Homotherium
What we have of evidence comes from the skeletons. From its teeth, its killing method would have been somewhat different from Smilodon.  The canines look like they were used for a stabbing action rather than slashing. The build of the body is much stronger at the front and heavier than modern cats, which suggests an ambush strategy. That in turn suggests cover in woodlands, which were very common in the Pliocene and much of the Pleistocene.