Both seem to have their merits and are priced about the same right now. King mattress are extremely popular, and for good reason. Sams Club Mobile - 13 Night Therapy Pillow Top Pressure Relief Memory Foam Mattress Bed Fr Bed Frame Mattress Memory Foam Mattress Bed Frame Bed Frame Sets Choose the right fit, and make tonight the first of many peaceful sleeps. Sam's club king mattress topper . Zinus mattress, 3, 3, 4, even though the box says night therapy the mattress on both amazon and sams club are the same spec, 3, 2, and 5. You can find their toppers, mattress protectors, mattress pads, and mattress collections at retailers like sam’s club, kohls, and amazon. Today, i came upon someone selling their saatva lineal base, which is also a split king, but has the wall glide feature, and retails for upwards for $2k, so may be better build quality/motors? And there certainly are a lot more reviews of the costco mattress. Anyone recommend this mattress or another one? Hi all...