Megadrive identification

Hi there , Please could you help me with an identification problem (collector related)

Contra (megadrive/genesis) pcb 353536
Probotector pcb 353536 and 353490?

Was Probotector released on 2 different pcb board numbers in different country's, my copy is 353536 ,my associates copy is 353490 in China
other uk copies for sale are also 353490

As I sold my copy to a collector unused we can't actually check the game is probotector or Contra ,very confusing 🤔...
Please can anybody help me work this out .

Kind regards