Very nice figures
Lovely shiny fellows. I'm just thinking Bob. Superficially there isn't a whole pile of difference between these fellas and their Napoleonic ancestors. I know the epaulettes were a sign of elite company status in the 1800s, but do you think you could use them in Napoleonic service and vice versa? The boots seem cut a little lower at the top, but other than that the differences aren't jumping at me.
I think you could easily use Napoleonic French dragoons for the Crimean War. As you have pointed out the main difference is in the leg wear. By the time of the Crimea red baggy breeches (which you can only just see in the pictures above) were worn, which were accompanied by boots that sit below the knee - as opposed to the tight white breeches and high, above the knee, boots of the Napoleonic Wars.
Not only that but with a little trimming on helmet you can create Danish cavalry for 1848, plus Crimean British lancers also easy to convert into Danes for a slightly periodcheers Old John