The only thing that will prevent KO's in this case is Takara either having better control over the molds or using a more reputable factory.
According to the Seibertron podcast the Lamborghini KO's are actually "lunch time specials". There is no way to tell apart from QC and that Lamborghini hologram if you have a real one or KO because they are made with Takara's molds.
I bet the KO Nissan's are the same.Err, might have my KO's mixed up.