1981 Struck Through A Split Planchet

I guess my question is based on differentiating between split planchet types.

-split planchet before strike which means a thin planchet is struck. It has elements of all of the dies but isn't a full strike

-split planchet after strike which means a full planchet was struck. It has a full strike on one side and smooth on the opposite side with a ghost image

- split planchet before strike, struck on top of another planchet creating 2 uniface coins

It seems like a significant difference to me so as I go through my split planchets and weigh them (purchased the scale after the split planchets) and you posted this thread so I wanted to clarify if there is a difference or if I am barking up the wrong tree.

Thanks for your input. I think I will start a split planchet thread soon to help study them.