Well, the main difference is that you don't have to spit while using snus like you do when you're dipping. But that's not the only one. Here are a few other differences:
Unlike moist snuff, snus is an upper lip tobacco pouch product.
And Swedish snus is pasteurized to eliminate impurities and deliver consistent quality. Most moist snuff is fermented.
Another difference is that General Snus is sold chilled to promote freshness.