I can't give you a comparison with any of the manufacturers you listed, sorry
![Cry :'(](https://leadadventureforum.com/Smileys/frankenstein/cry.gif)
But I do have a set of the WGF Celts and a bunch of Warlord's plastic Celts, and snapped a quick comparison of those two ranges, which may be helpful?
![](http://i35.photobucket.com/albums/d197/Myntokk/photo_zps52e6f61a.jpg)
As you can see, I'd say scale-wise they're pretty compatible, although the WGF ones are noticeably less detailed. They do come in some nice poses, though, whereas while dynamic, I found the Warlord set to get a big redundant.