
I believe the rots of the American Eskimo are similar/same.
It is similar to the Keeshond and Wolf Spitz issue.
The Keeshond was developed in UK and America and a standard formulated. In parallel you had the Germans who claimed the Wolf coloured Spitz as their own and in FCI countries the Keeshond and Wolf Spitz breed are considered the same even though there are differences between our Keeshonds standard (requires spectacles and size differences) and that of the Wolf Spitz.
I suspect the FCI view the American Eskimo as another name for the German Spitz which is why they accepted the dog at their shows under that breed name and it is how the dog qualified for Crufts as a German Spitz.
A similar situation existed with my breed in Norway and Sweden. In Norway ti was the Norsk Elghund Gra (Grey Elk dog) and in Sweden they bred Grahunds (grey dogs). It was eventually agreed that they were essentially the same breed, but the leggier type with light cheek markings and white on the legs was separated into the Jamthund or Swedish Elkhound as ti was distinctly different.
Similar things have happened in the evolution of types of dog into breeds. Like Spaniels and Retrievers, when strains became distinctive, they became breeds.
Also many breeds have developed a different look and have differing standards. Labradors have a taler height in the USA for example.
The FCI has unified standards for countries that show under their Umbrella, using the country of origin's standard.
This has caused problems for example in Dachshunds in Ireland that have always been bred to the UK standard, and now are judged under the FCI standard which allows for three sizes and not two, and size is based on chest circumference and not weight with a maximum weight for standards.