I was referring to what are also called Sabelpoots.

As far as my limited knowledge stretches, aren't they a separate breed? Different standards, and such?
Here's a little information I found on belgianduccle.org:
Although the weights of the
TWO BREEDS are the same
ONE MUST always keep in mind that these are
TWO DIFFERENT BREEDS and there are Major differences in the two Breeds.
The Booted Bantam has no Beard, has Large Wattles, is Taller and has a "U" shape between the head / neck and tail. Because there is d'Anver blood in the d'Uccle bantams the
d'Uccle is a shorter bird, has a broader breast, Bull neck, very, very small wattles (or none) and a "V" shape between the Head/neck and Tail.
The first varieties of Belgian d’Uccles were the Mille Fleur, Porcelain, and White, but the Mille Fleur was the first variety entered into the American Poultry Association's Standards of Perfection in 1914. This was thirty-five years after the entrance of the Booted Bantam (a distinctly different breed from the Belgian d'Uccle). I mention this because sometimes the Booted Bantam and the Belgian d'Uccle are confused with one another.
~Alex