Griddle or grill, how do you know when it's hot enough? “Medium heat is ideal: Not too low, and not too high.” Waxman says that for all grilling mediums, it should be the same, but it's relative to the type of grill that you’re using. If the grill is open-style, which means that the heat goes vertically straight up, then the burger doesn’t get the residual heat, and you are just cooking from the bottom up. This technique takes a lot of skill, Waxman explains. But if you use a grill with a lid, you can close the grill and capture the heat to give you more control and more smokiness. Also it allows you to play with the temperature more. But he does say that neither is better than the other for cooking burgers, you just need to understand what you’re doing. One thing he recommends though is going the extra mile to use hardwood charcoal, not briquettes.