The difference between 1807 French and French revolutionary is small (different hair, longer but certainly neater coats, no light companies included, different flags of course). But of course, in the FR period the style of dress is also different (less formal and partly civilian) for the volunteers and conscriptions. In the FR they used also battalion guns.
Regarding the Perry plastic austrian cavalry, these have the post 1801 uniform; afaik up to 1801 the cavalry still wore the open coat and tricorne/bicorn (the Ottenfeldt prints are wrong imho)