Donaire was a great example of a true champion, as he was well aware that Inoue could beat him again, and yet he still risked a unification match to test himself against Inoue once more.
Inoue is also a great example as he always seeks to fight the best opponents, which is why he became an undisputed champion in the bantamweight division. After winning, he wasted no time in moving up for the super bantamweight title match. If he succeeds again, it would be a tremendous accomplishment, and I am certain he will continue pushing his limits.
The reason why he was being compared to Pacquiao as he's not afraid of taking fights that might strip his belt, I mean,
the challenge that he's facing attribute to his greatness.
Like what you mentioned, after unifying all the belts in the bantamweight division, he's now here, challenging the current
Champ and will try to take the belt on Fulton's name. It will be a great challenge as fans will expect him to win.
Conclusion will be dictated after the fight, if who between Inoue and Fulton will hold the belt.
He won't reach the success of Pacquiao, though, because becoming an 8th division world champion is hard to surpass. However, with the current journey he is undertaking, he can surely achieve more success. He continues to move up with his power and speed, enabling him to dominate even in higher weight divisions. Additionally, Inoue has a strong chin, as he was hit cleanly by Donaire multiple times but still managed to stand up.