It does if you don't want scars!
i do see IVW's argument regarding a small shot pattern is not much different in coverage or hitting a target than a slug. I also am curious of the tss penetration and shock value.
the slug will deform (maybe) and expend more energy and tissue damage.
the tss in the correct size might actually act like a slug only better. it will spread inside the animal and act like a deforming lead slug, expending energy and tissue damage.
I do agree with IVW that shooting some large pigs would be a good approximation of shooting a leopard, the shield plate on the pig should result in some significant resistance.
anyway, if one wants to shoot a wounded leopard with tss and are willing to bet your skin on it, have at it. i tend to think that the larger sized tss would work pretty good, but like others have noted, it is unlikely i will hunt leopard. AND, i would kill it with the first shot!