I tried the other Moon Pillow (the one with 6 inches of height and squared corners) and found that one was great for my curly hair but not good for side sleeping. With that one, I kept trying the Sleep Restoration pillow as well to see if I could get better sleep as a Side sleeper despite how much more comfortable the Moon Pillow was. Great, but not perfect.This one is perfect for my side sleeping. The extra 2 inches does indeed translate into more support. However, it feels firmer overall, as though there's a denser base layer upon which the fluffy segments rest. It lacks the pure fluffy puff factor of the square cornered Moon Pillow, but missing that initial floomph experience as my head hits the pillow is a sacrifice I'm willing to make because it's performed so well as a pillow for me as a side sleeper. It's cozy, soft, and supportive - a hard to achieve trifecta for side sleepers.With the other Moon Pillow, I occasionally switched it out with my Sleep Restoration pillow because both kind of had imperfections and I kept trying to compare them for a better sense of which was better/worse. With the Pineapple Moon Pillow, I had no need or urge to try the other ones, beyond a few early checks to compare and confirm that This Is The One.I don't reach for the other pillows unless I'm creating a reading stack for cozy reading time. Well, and when I want to dry my hair into perfect curls - this one just doesn't offer the same crisp definition in my hair as the Moon Pillow. I'm guessing that's because the increased density of the Pineapple doesn't allow for as much air circulation.Like the Moon Pillow, this is made with percale cotton which means it crinkles and crackles a bit. It's not plastic, it's a mark of quality materials (percale sheets are fantastic in the summer!), and I'm glad the manufacturer hasn't cut corners here.I recommend using pillow cases with a design on one side so you're not left groping the pillow inside a single color case trying to figure out which side has the loaves and which is the firmer bottom. You can use this without a pillow case, but I personally prefer to go between washing the actual pillow as long as possible so pillow cases are a must.As always, the human body contains myriad micro differences: I've found that this pillow fits the curve of my neck and shoulder almost perfectly for the way I sleep, but YMMV. I would generally suggest trying the square corner Moon Pillow first if you're not a side sleeper needing the extra support, as the floomph factor is superior in that one.