The color won't be a better match but the finish is different because it is a different system. I'm not sure that acrylic enamel is still available. It is not easy to apply without orange peel and runs. It's an entirely different approach.
It can be polished out to resemble two stage but the issue is that if you want to go that route, you can't control the thickness of the paint on the high points of the sheet metal and it is very easy to sand through.
i say sand through because that is what you do to polish it. You work the sanding up to at least 2500 grit if not 3000.Even if you get the paint, the original systems were force air dried going through a heat tunnel.
There was no hardener used in the paint.
The last enamel system that I used required a hardener. This is the bad system. The curing process produces potasium cyanide like used for executions in the "gas chamber". Forget about using it where the paint shops are regulated. That won't happen.
You need to be out in an area where there are no nearby neighbors and where the fumes won't execute anyone.
Current two stages are much safer and more durable for a longer time.
There really are no shops set up for the enamel system. If you could find one it's going to be three days drive from nowhere and they will probably charge you double or triple just because.
Additionally, I know that there are NO groups judging Panteras for Concouse accuracy in the US that have any kind of jurisdiction. So when you see the term Concourse restoration advertised with a Pantera for sale, it is only a salesman's promotional abuse of the term.
I know that the Mustang, Shelby and Cobra people do not give any points at all for using the original paint systems. Any paint system is ok so why bother if you think you even get Brownie Points for using enamel?