No. Adv coc is AP booster. With adv coc , sabo can close the gap for sure.
No guarantees akainu will have adv coc though
Akainu is the leader of the WG's strongest force, so why should be there a reason that he's lacking CoC? Fucking Chinjao has it. Akainu is also closely tied to Luffy and he was the sole reason why Luffy made all the changes.
On the other hand, there's no guarantee of Sabo having CoC either.
Luffy will definitely fight Akainu but sabo may very well be the one to beat Akainu and luffy moves on to fight great imu.
Sabo was also Ace' brother but he wasn't even present in the war, so Luffy should be robbed from getting his revenge against the man who killed his brother in front of him?
Who permanently scarred him?
Whom his scar still aches when he hears Akainu's name?
Be realistic because there is not a single valid argument why Sabo takes over Luffy's fight like that. Luffy vs Akainu is personal and the former has all the reasons - and the most - to have his fight against Akainu.