It's not really fall until Starbucks releases its popular Pumpkin Spice Latte ... test between the Starbucks latte and the Dunkin' Donuts latte to see if people could tell the difference between ...

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.