The difference between our "Toe Spacer" and "Toe Separator" is the material and amount of spacing between the toes. The Separators (Medical grade silicone) come in 3 different sizes. The Toe Spacers are made of SBS rubber and are one size, but come in 3 different densities/hardness instead. Along with larger spacing between the toes. Furthermore the Toe Separators also have a "slit" between the 1st and 5th toes where you can place more material (such as cotton or any other soft material) to allow for greater splay. We recommend the Toe Separators for those that experience blood-flow restriction, pain and/or recovering recently from surgery.