Tests and 6-bit Coding on non Leica Lens

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I'm new to the M8 and have always wondered that if the coding for the 21mm ASPH is used for the CV or Zeiss equivalent (Code: 011000), was there any reason Code: 000001 was not tested? If there are different characteristics that need correction specific to a certain lens, why then would not the tests be different since the third-party lens may have a code even different for Leica equivalents? Same goes for the other lenses like a Noctilux which when used on a FF camera, is f/1.0 in the center but f/2.0 at the corners (so the price differential is for speed at the center). But used on a cropped camera, this may not be so pronounced.

 

Leica M8 Lens Codes

 

Also, would tests conducted specifically for the M8 have a different result from say the Epson? If the 21mm ASPH has more center sharpness and edge softness relative to a Zeiss as an exanple, would this be more beneficial on a cropped camera like the Epson instead of a film camera?

 

Sorry for all the newbie questions and thinking out aloud.