Well, if they also share those fatal genes, then they are probably still very closely related to the Chilean araucana, but the crests are definitely different from what is considered standard for the breed in the Americas... I think this speaks quite a lot towards some of the things
@Shadrach has said about local breeds. And it does fit in well with evolutionary theory. That two identical breeds separated by significant distance and probably different crossings into the lines, (because you can only straight line breed for so long before things start to go horribly wrong... as previously demonstrated by some royal houses

) will start to develop differently. I’m sure the Marans lines here bear very little resemblance to those where they began as a breed.
I think that the intensive breeding to weed out that genetic fault in the Ameraucana, may be a part of it. Like the overselective breeding in pugs and bulldogs resulting in breathing issues, and afghan hounds and standard collies with their super narrow skulls not being the brightest of breeds (Sorry Lassie!). I do forget if the Araucana Blue gene is a dominant one... but because of the Rumplessness, difficulties breeding them because of it, the fatal gene, and the general rareness of the breed in my area I didn’t really consider them for my flock.