Is pre worn leading edge the same as leading edge relief? Was looking at the Wedgeworks K* which said it has leading edge relief. Is that the same as a pre worn leading edge?

Wedgeworks had an additional hand ground option for a pre worn leading edge which made me think they are two different things. They filter their hand ground options depending on the loft and grind you pick on their website but for some reason they still have pre worn leading edge as an option under K*. I called Wedgeworks and the guy on the phone didn't know.