There's not as much difference as you think.
Both are physical players. Neil is obviously more physical, but Torres can throw just as big of hits. And of course Neil is tougher and more intimidating, and actually enjoys dropping the mitts.
But Torres has better numbers than Neil over his career, regular season, and playoffs. Not saying that I would take Torres over Neil, but the fact is both are third liners who provide physicality and a little bit of offense.
If that's our only goal for Kassian, then we should have never made the trade. But I have a feeling he'll be a much better player than either of those two.