DIfferences in Sportero Chassis Codes

[nirtime]

Can anyone tell me what is the difference with the KB4 and KB8 chassis codes on the L200?
Tried researching out of curiosity and came up with nothing.

 

[Mad racer]

I am not having information about the programming of the car but i really want to know more about the programming language of the models to understand it.Can anyone know proper about it ?