We also have to consider the quality of opponents Casimero has face in the past as compare to Akaho.
Akaho has failed in this two world championship attempts, while Casimero has been tearing the bantamweight leading to the failed fight against Paul Butler. And John Riel is the younger of the two, the road warrior but obviously the experience goes to Akaho as he has been professional boxers for 17 years as to Casimero's 15. But again as I have said, the key difference is the opponents that they have fought and so I think this is the big advantage for John Riel Casimero to win impressively.
There is no doubt that Casimero is a fearless boxer. I watched the fight when he go to the country of the champion and got mobbed by the audience when he won the fight. I think that is the fight that put Casimero on the map

. About experience, 17 years and 15 years is almost even when it comes to determining a veteran boxer. They both have lots of fights, lots of pressure, and downfall, so basically I think no one has an advantage when it comes to boxing experience.
The thing is Casimero is a controversial boxer which made him more popular than Akaho. Between boxers, the younger primed boxer has more advantages than the older primed boxer especially when the older boxer is about to get passed his prime. So between I believe Casimero has the advantage in this fight.
Well, right now, Casimero should know his place first as he is a first timer in this division and might be best for him to lower his head first because he doesn't have anything yet to boast. Not sure what happened to him lately after he was stripped because that made him changed but there's surely a reason why or he maybe just learned his lesson because having a bigmouth seems not helping his situation.
Indeed he has to prove himself on this fight. Going up after losing the titles and the scandal that cost him his title is a huge factor that downgrade his popularity. So he should KO Akaho in this fight to regain those lost popularity and once again prove that Casimero did not fall to becoming an oridnary boxer after moving up his weight division.
I agree that a knockout will be the ultimate goal for Casimero to retrieve what he has lost recently, except for that title, obviously. But a win is a win even if it is just a UD. He should just forget about achieving more if he cannot really do it this time as he still needs some adjustment because he haven't got any fights for some time now. Defeating Akaho will still mean the same thing, he will still go through the ranks.
If ever Casimero has to win via UD, he must show the audience that he dominates the fight. A close UD fight will somehow put Casimero's ability to compete in that division questionable.