I bought both the spray and gel, because I thought they were different, but they are the same product, only the application is different. Someone had a survey thread, on who preferred which product, and gel was preferred by most because some of the dogs are afraid of spays. For me, the spray is really fast, and I have no problem spaying a spurt in each side of Joey's mouth. The gel can be applied with finger or q-tip; in fact, it's not necessary to coat the teeth with it because the dog will do this, as he's "licking his chops".

Just remember, no food for 30 minutes after applying.