Antitaenite and taenite have the same crystal structure (face centered cubic) and can have the same chemical composition (same proportions of Fe and Ni) but they differ in their electronic structures: taenite has a high magnetic moment whereas antitaenite has a low magnetic moment.
The distinction between antitaenite and taenite lies in their differing electronic structures, which influence their magnetic properties. While they share a common crystal framework and chemical composition, their unique electronic arrangements give rise to distinct magnetic characteristics.