what is the difference between the garter style and the silicone dot. do they both hold up the same. and why is one more expensive than the other?

The difference between the garter style and the silicone dot style is the silicone. The garter style has a plain top band that allows use with a garter belt or the It Stays Adhesive. The silicone border allows the item to grip itself to your thigh, holding it in place.