Perfect Sukuna possesses greater overall power due to a higher power rating (20 compared to Heian era Sukuna's 10) and superior speed (30 vs. 20), which allows him to outmaneuver his opponent in battle. While Heian era Sukuna has a powerful attack in the World Cutting Slash and is formidable with his magic power of 50, Perfect Sukuna's mastery of the Malevolent Shrine allows him to unleash guaranteed slashes throughout a larger area, including abilities like Cleave and Dismantle that can cut anything. Additionally, Perfect Sukuna's Reverse Cursed Technique grants him nearly immortal status, providing him resilience against Heian era Sukuna's attacks. Overall, Perfect Sukuna's combination of speed, power, and versatility makes him the dominant fighter in this matchup.