How the car runs or engine works is, well, sort of, universal, and most of the internal combustion engines have lots in common.
The new models boast more power, more fuel efficiency, or more automated computer system, etc., but the basic concept of the engines has not changed much since its innovation. Sure, it has evoloved a lot for better, smoother, and faster ride, but the "basic" design remains the same and that can be said for the real economy cars and really high-end super cars as well.
So, my take here is that there cannot be many "original" or "manufacture" movements, per se, as most would be based on "something" or some movement design in the past. Some "original" movement may have longer power reserve, more reliable, longer service free period, have chrono, alarm, minute repeater, digital instead of hands, annual calendar, paerpetual calendar, etc. It is just a way of presenting the products or advertising/marketing. If something like Hybrid engine is created in the horology, people will umph in awe
I admit that it must take loger time and cost far more to NOT base the movement on something that exists today, maybe years and millions more, and the brand is entitled to charge more - whether people appreciate and buy them at that price is in totally different dimention. So, the market dictates that if that sells, then brands make movements in such a way. But if it doesn't sell, then brands would rather modify the existing movements. Our demands mean something, but the market power may be more powerful in the end - so, this may not come to where we shoot our foot.
Just my 2 yen.
Ken