After I did the comparison post on Austrian cavalry it was pointed out that I'd missed some. Obviously I don't have every manufacturers figures to hand to compare them, but there are some that I did have that I forgot about including, so here is another comparison with other figures.
These are, from left to right in both pictures, an Austrian Hussar from Blue Moon, a Uhlan from Battle Honours, a Dragoon from Boki Miniatures on a Campaign Games Miniatures horse, a line infantry officer from Old Glory, and an AB general.
These are all roughly compatible, although the Old Glory figure and horse seem a lot smaller. For other Old Glory mounted figures I've remounted them on larger horses and they look fine, but this is a single piece casting, so maybe not the best representation.
The Battle Honours figure is a little small as well, but would possibly benefit again from going onto a larger mount.
Blue Moon's figure is by far the smallest of the separately cast riders, and although he's on a larger mount he still looks like a very small 15mm figure, especially when you consider that Blue Moon's foot figures are closer to 18mm than 15mm. The other issue with this range is that the horses are very thick through the body, so other figures can't sit on them comfortably.
So, the only range that I would like to have shown that is missing is the Fantassin/Warmodelling/Battle Models range.
Here's a link to the last comparison in case you missed it... LINK
Hopefully this is a help again.