Stomp match.
Akainu has:
Better Haki.
Arguably better endurance (Sanji needed regen to survive getting his bones and organs clapped, Akainu got rocked by Whitebeard's shockwaves and thrown in a ravine and survived albeit with clear injuries)
Better heat/resistance to it (Literally said to be superior to the user of the Mera Mera (Flame-Flame) fruit who specializes in Flame Manipulation and is highly resistant to it)
Better stamina ( Fought Kuzan, who was equal/relative to him, for 10 days and eventually won with the option of killing him, though he didn't take it )
Alternatively,
read the profile for proof.