IMO, you'll get the same durability with XXX as Natty's. Durability can fluctuate depending on environmental factors. Daily driver that sits out in the elements, garage queen, weather conditions, even environmental conditions such as living in industrial areas all factor in when it comes to durability. Even the products you use in between waxing/sealing can enhance or degrade your lsp. With that being said.......expect 4-6 weeks on average with XXX.