It's worth noting that Starbucks uses pumpkin puree in its pumpkin spice sauce, while Dunkin' does not. Between the extra syrup and the actual fruit use, it's no wonder that consumers widely ...

But pumpkin spice lattes is not the only way Dunkin’ Donuts is competing with Starbucks this fall – both have now introduced instant-win mobile campaigns to entice customers into their stores.