I dont think its any easier to clean up a sml. Its, imho, like having a rare breed cat.(not dog or horse). Many folks already dont understand having a cat(ML). So getting a rare breed of cat(Smokeless ML) say its a Savannah(Rem700) or an Ocelot(Savage 10ML) is just a way of having a cooler cat then 98% but not really being any better/different at the same time. It takes more money, has a special diet, doesn't act like a normal cat, could kill you if you aren't careful, but in the end it is still just a cat(ML). But as everyone knows all cats(MLs) are very cool regardless.
Having a smokeless cat, i mean ML, just puts you in a tiny, exclusive group of nutjobs.
Anyway, thats why I have a cat/ML. That and my wife won’t let me have a fainting pygmy goat or a Savannah cat, so i got a SML.