Great question that so many of you have had! The pillows are both the same size and they both work to suspend your face. The Original is made from a 100% cotton pillow body and includes a removable custom cover. The Just the Pillow is the pillow body wrapped in Satin & Lined with a non-woven (like the airline pillows you used to get). You can use the La Petite Pillow Cases on both.