What is the difference between Duro-Polish and Duro-Polish Plus?

Both products offer the same benefits of gloss and slip-resistance. However, Duro-Polish Plus also contains a halogenated silicon-containing additive that provides stain repellency from both inorganic and organic containing materials. In other words, Duro-Polish Plus provides stain repellency from common stain-causing agents such as soft drinks, coffee and tea, as well as oil and grease.