What is the difference between the 3/8" Heavy Duty Rubber Rolls and the 3/8" Pre-Cut Regrind Rolls?

So overall, both products are essentially the same; The same thickness and same material, but there are differences between the two. So the regrind rolls are all made from all the scrap material that we get from making our standard rubber products like our Heavy Duty Rubber Rolls. The confetti version of our regrind rolls has the same density as our standard rubber flooring and can be used in all the same places. The black version of this product is less dense and is great high impact workouts and plyometrics. The only other difference between the two are the color offerings.