Both formulas have a 1-1-1 ratio, meaning that they contain equal amounts of nitrogen, phosphorus and potassium. But 20-20-20 has these nutrients in slightly higher concentrations. Whereas Triple 19 would have 19 pounds of each nutrient in a 100-lb bag, Triple 20 would have 20 pounds of each. When it comes down to performance differences between the two formulas, the results will be about the same.