Ooooh. Now you're asking...
Alan Marsh did most of the later additions, including some of the gun crews and the last few cavalry packs. Nick Collier did the first 80% of the range (also including some gun crews, which is confusing)
Stylistically, Collier's figures for Renegade and Bicorne are virtually identical. But some of the rank and file Bicorne infantry are definitely slighter than the Renegade equivalents which are right up there at the big and chunky end of 28mm.
The cavalry and character / command figures are all round about the same size, Bicorne and Renegade.
The Alan Marsh figures for Bicorne are stylistically totally different - much squatter and with big hands and feet. Still characterful, but nowhere near as evocative of the period IMHO.
For instance, in this picture...

The figures on the left and right are by Marsh. As you can see, they have a very definite 'munchkin' look, compared to the Collier figure in the middle. Figures number 2 and 4, I think are also by Marsh, but perhaps a bit more 'in the style of' the rest of the range.
The Collier sculpted gunners below have a very different look. His posing is much less stiff, more natural and more dynamic.

Collier also sculpted a third ECW/TYW range for TAG, which again are stylistically very similar, but definitely 10% more diminutive.
