Re: This is probably very bad..
I can for certain tell you that those outrageously blatant copied cars have no superior features, except of course, much reduced price.
That might be enough in this context. Consider the example of the German Panzer versus the American Sherman tank. Sure, the Panzers were better, but the US produced Shermans at a rate of somewhere around 8 to 1. Additionally, knowing the capabilities of your opponents in a conflict makes planning a lot easier. That's one of the many reasons military tech tends to be classified.