The Twig is the milder, gentler version of our single-blade razor. This is a great choice if you are: a) new to shaving with single-blade razors; or b) have generally sensitive skin, or lighter hair. The Thorn is the more aggressive version of our single-blade razor. This is a great choice if you are: a) experienced with single-blade razors and know you like a more aggressive setup; or b) have generally darker coarser hair where the extra blade gap will come in handy.