this is an unpopular opinion but burger king, and here is why:
Their burgers are cooked nicer, juicier and a lot bigger than the mcdonalds patties. Also, the burger buns are just at a better quality and the fillings are nicer.
The fries are bigger and more salty than at mcdonalds (i prefer lots of salt on my fries)
the chilli cheese bites are to DIE for
ultimately, the whopper will always have a special place in my heart.