First of the
Irregular Miniatures cavalry. These are very different in style to the
Spencer Smith figures - have to admit, I prefer the Irregular horses. On the other hand, with the Spencer Smith website you can link directly to a particular page.
The Lancers are serving as generic British Lancers - they're actually Prussian Uhlans but the only really noticeable difference is the lack of a plume. Closest Regiment would probably be the 9th.
The French Currasiers are likewise quite generic - fact is, don't know enough about them to be specific. Saddlecloth may be wrong for rank and file - pictures suggest plain for these, blue edged with red for officers - prefer the blue/red combo so...
And this is a comparison between Spencer Sith and Irregular cavalry figures. Important thing being they are basically compatible.