Grills have grates, while griddles attribute a flat cooking area. Anything cooked on grills can even be cooked on griddles, although not vice versa. For instance, you'll be able to’t cook omelets, eggs, or pancakes because of the elevated ridges on grills. Griddles are sometimes sold as commercial grill types https://www.cindersbarbecues.co.uk/cinders/get-your-grill-ready-for-national-taco-day/