International Physics Olympiad vs Regeneron ISEF Awards

Comparing two elite STEM opportunities. International Physics Olympiad is a olympiad while Regeneron ISEF Awards is a competition.

International Physics Olympiad Regeneron ISEF Awards
Prestige Tier Tier 1 — Elite Tier 2 — Highly Competitive
Type Olympiad Competition
Organization International Physics Olympiad Organization Society for Science
Acceptance Rate Extremely selective. Only 5 students per country advance (approximately 400-420 students total compete at IPhO from 80+ countries). At national level, typically 0.01-0.1% of secondary students reach IPhO depending on country. Approximately 1,600-1,700 finalists compete at ISEF annually out of significantly larger pool competing at 365+ affiliated fairs; roughly 600 finalists receive awards/prizes (37.5% of finalists awarded)
Applicants Varies dramatically by country. China, Russia, USA, South Korea, India, and Taiwan have thousands of competitors in national rounds. Globally, estimated 100,000+ students compete in preliminary rounds across all participating countries. Over 1,600 finalists selected annually from 365 Society-affiliated fairs across 60+ countries and territories; total number competing at all affiliated fairs globally is much larger (tens of thousands)
Deadline
Award $7,000,000
Cost to Apply $0 Free
US Only No / International No / International
Grades Secondary school students (typically grades 10-12, though exact definitions vary by country) 9th through 12th grade (high school students)
College Impact Extremely prestigious for college admissions. IPhO medals (especially gold) are among the most respected accomplishments in high school physics competitions and are viewed extremely favorably by: (1)... Reaching Regeneron ISEF as a finalist is extremely prestigious in college admissions and carries significant weight. Top colleges (Ivy League, Stanford, MIT, etc.) view ISEF participation highly favor...