I've never used SM pellets but they are supposed to be comparable to Oxbow and are an okay pellet to feed.
It's a nice hay and doubt you'll be disappointed. My pigs loved the meadow hay (it's thinner and more of a grass than your regular timothy hay). I'm not sure if they *prefer* KM hay or just preferred it because it was new. My pigs also seemed to "prefer" my emergency bag of Oxbow orchard grass in between KM shipments. My pigs just like new things
Good luck