Nectar Memory Foam Queen wins overall with its 12-inch height, cooling cover, and CertiPUR-US certification versus the Casper Original Mattress's 11-inch all-foam build and $895 MSRP. Casper provides better value on price but trails due to discontinued status and fewer modern features. Nectar leads in 5 of 6 score categories with advantages in performance, features, quality, and longevity per t...