What are the differences between the Brondell Swash 1000 and the Brondell Swash CS1000?

Both of these seats are the exact same.  The only difference is who they are being sold by.  When Brondell sells seats to Costco to sell, Costco rebrands them as the “Brondell Swash CS1000”  If you get a seat with this branding, you know it came from Costco.  If you get the same seat labeled as Swash 1000, you know it came from someone other than Costco.