Camber grunts all the time. She gets parched barking (she'll eat snow after each bark), so grunting is her norm. No snorting sounds. Never really thought much about it; she only makes sounds during play.
Honey does a heavy breathing/grunting when she is super excited and playing hard. It's kinda pug like. She also does the reverse sneeze thing too, but that's very different. It's much stronger and usually stops her in her tracks tell she can get it cleared. I must say the reverse sneeze kinda scares me. It looks like she can't breath snorting over and over, though we do live in a heavy allergy region. Luckily she doesn't do it often and it clears quickly. Neither seem to ever bother her :)