I kept three yoyo loaches for several years in the same tank as a lot of (pest) MTS snails, and I don't think the loaches could get through the MTS's thick shells. Much to my dismay.
For a little while (like a month or three), I also had a bunch of juvinile apple snails in that tank with the loaches, and I didn't observe any snails getting eaten... but it was a lot of snails so it's possible some got ate without my noticing.
Honestly though, I'd stick with the consensus and keep my snails and loaches in separate tanks. If you search the forums here, you'll find plenty of examples of snails getting injured or worse by bitey tank-mates.