By Colette Bennett Sometimes bigger really is better. But if you want to test BK’s latest specialty, you’ll have to travel. We all have our fast-food favorites we go back to time and time again, from a classic Single with Cheese at Wendy’s (WEN) – Get Wendy’s Company Report to a good old Quarter-Pounder at McDonald’s (MCD) – Get McDonald’s Corporation Report. And while we all have those moments where we just want a comfort meal when the workday is over, the fast-food customer wants to try new things, too. With so many other big names to compete with, fast-food brands must constantly innovate t…