The Bottom LineNectar and Casper Wave have similar features but applied in a very different level of quality, and therefore price. Nectar is good for lightweight and average back sleepers. Some Nectar owners complain of sleeping hot and excessive sinkage, especially if they have a bigger build. Casper Wave is a tad cooler and firmer with targeted support for proper spinal alignment. Being medium-firm and having all-foam construction, it is more suitable for back and side sleepers. Casper Wave offers limited features for the pretty high price tag. Brooklyn Bedding Aurora costs less than Casper and provides a better cost-based value and features. The only mattress in this comparison that allows you to choose soft, medium, and firm versions, Aurora, is an equally good choice for side, stomach, and back sleepers. Being a 13-inch hybrid, it is remarkably supportive for heavier persons. The cushioning, responsive foams make it an equally comfortable surface for lightweight persons. Moreover, it sleeps cooler than all-foam Nectar and Casper Wave. The US-made Aurora is clearly the best choice for couples with different sleep preferences.