My bet is on Inoue. Hes a very good fighter, his techniques are outstanding. And with a record with 19 wins, its hard not to like him.
You are right, it's not hard to like him to win this fight and in fact he is the top dog here. Styles makes a fight as they say and i think that Casimero has that fighting style to beat Inoue here.
Here's more update on Inoue and his plan on his future.
Naoya Inoue Staying in Form, Hungry To Still Face Casimero
https://www.boxingscene.com/naoya-inoue-staying-form-hungry-still-face-casimero--148258