When I made up the concept for my Pre-Bardin uniform project, I originally had in mind to depict the uniforms of all the armies which fought in the same uniform as Napoleons French army did. As I went through my research, this concept of painting all possible varieties of that uniform type diversified a lot. For example, I wasn't aware about how many different units with different uniform colours even the Italian army had.
I wasn't aware about how much different varieties of the same uniform were in duty even within the French army itself. And this is why I have to paint at least several different French regiments in order to display that even within an army with common regulations, there was a certain range of variation.
My newest unit is the line infantry regiment no. 30:
For direct comparizon, here's the 63rd regiment once again: