Ace left to become a pirate when he turned 17, same as Luffy. He died at 20, and it's been roughly three years from when Luffy started as a pirate as well. So at this point, do you think Luffy has surpassed Ace in power? Luffy with his Gomu Gomu no mi always lost to Ace, and that was before he had the Mera Mera no mi, so there was undoubtedly a huge gap in power. After his two years of training, I feel Luffy may have passed where Ace was before he was killed (Ace would still be stronger if he were alive.) He seems to have mastered haoshoku haki, along with the other two forms, not sure if Ace had full control over his haoshoku or was as proficient in the others by the time of his death. Who do you think would win, current Luffy vs Marineford Ace at full health?