Dragoon
No I don't think they are new sculpts, just rarely seen. I have been told that there are a number of different sets of the Infantry in Greatcoats though this is the only one I have ever seen.
Scott
Same sculptor and same master figures. All the early AiP ranges are plastic versions of the SOW ranges, though not all the SOW figures have been released as plastic and I have seen Regal working on some AiP sculpts that won't be put out in metal.
Scott
(Is it just me or are there a lot of Scotts on this forum? Does the name have some pre-disposition to collecting toy soldiers?)