428STREET, Stan has written one of his fine treatises - this one on the whole 'originality' thing - which is well worth reading, but I like his earlier comment, too:
...Please take this in the spirit in which it is intended: you are asking the wrong questions...
That wasn't at all intended to be rude. I think it may go to the heart of what you're trying to figure out in choosing one of these cars.
Currently, you have a choice of about four viable builders of new replica Speedsters, at very different price points. Those four vendors don't offer increasingly better 'originality' as the price increases. Better chassis design, better build quality, better levels of fit and finish, better reliability, better quality control, definitely - but they're all about the same as far as 'originality'.
Anyone who knows these cars can immediately spot a replica - any replica - no matter which builder it's from. As Stan and others have said, you can take a car from any vendor and tweak the cosmetic details to make it look much closer to 'original'. If that's your main concern, start with one of the cheaper builds and swap out road wheels, steering wheel, interior trim, upholstery, etc. and you can get very close to something that looks 'original' - from fifty feet away, at least.
Some people do just that, drive the car to the coffee shop twice a month, and are very happy.
It's only if you expect the car to perform like a sports car, if you want to drive it for very long on modern roads and in modern traffic, that this plan starts to fall apart. It's the other stuff that distinguishes the different builders - and the different price points - that will start to matter more to you.
Some of us have started with entry level builds and gradually upgraded the mechanicals - at substantial cost - until we have reliable drivers that are up to the task. Others buy a better build to start with and have less work to do.
The smart thing is to do your homework before you buy anything. And there's a lot of homework to do. Read, read, read - everything you can find about these cars. Definitely get some seat time in cars from the various builders if at all possible - SOC gatherings are a great place to do this. But don't be in a hurry to buy.
I bought a new VS about a year sooner than I should have. If I'd waited, I could have made much smarter choices on the build sheet and saved myself a ton of grief and money.
It sounds like you're off to a good start. Your eyes and your ears seem to be open. And you haven't yet written any checks.
That may be the most important thing.