Quick Overview: All the power of Red Relief, the best selling red stain removal product, in a one part solution. Feature Question: Should I use Red 1 or Red Relief? Answer: You can rely on both products for the ultimate performance in stain removal. However, Red 1 requires no mixing and is faster acting than Red Relief but it has a stronger odor. If you want simple and fast use Red 1. If odor is an issue stay with your tried and true Red Relief. Either way you can't go wrong.