When you're craving a quick ice cream treat, you'll probably snag a McDonald's McFlurry or a Dairy Queen Blizzard. But what's the difference between these two?

The original five were Oreo, Heath, Nestle Crunch, M&M's, and Butterfinger. While combining ice cream and chocolate-based candies may be objectively delicious, the major appeal of the McFlurry was ...