Neither!! They are both terrible for you!! KFC instead even allowed to use the word 'Chicken' because so little of what they serve is actual chicken!! Most of it is genetically modified, steroid injected, cloned cells, made and manipulated in a laboratory. While McDonalds is largely filler meat and not "100% beef" as they advertise that is also why when you hear them advertise about their chicken nuggets they say that they're 100% white meat but they never say what kind of meat. Furthermore, the kitchens in both establishments are typically so disgusting that there are often times bugs, rats and diseases rapid within. I would never eat at either again.