EB-1A and O-1A are both extraordinary ability classifications, but they differ in standard, intent, and scrutiny.O-1A* Requires distinction, often described as being within the top tier or roughly the top 10 percent of the field* Designed as a temporary, non-immigrant work visa* Approval focuses on meeting the listed criteria without a broad subjective ranking of the fieldEB-1A* Requires sustained national or international acclaim, often described as the top 1 percent of the field* An immigrant category that leads directly to a green card* Includes a Final Merits Determination, where USCIS officers make a holistic and subjective judgment about whether the applicant truly belongs at the very top of the fieldBecause of this higher and more subjective standard, approval of an O-1A does not guarantee approval of an EB-1A.