As i've said before, Casimero have different style than Donaire. The latter is more of a counter puncher while the former is an aggressive fighter that he will take the fight to his opponent. Rigo will be overwhelm by Casimero when bell rings as he eager to prove to his fans that Rigo will not derail his path to a big fight with the Monster.
That's correct, the style of Donaire is very simple, knock his opponent out and he will win.
I saw some of his fights that he struggles, his fight against Walters is one good example, he hit Walters good but he cannot knock him out so instead, Walters knocks him badly. Another good example was his fight with Inoue, he also has some good rounds but he cannot take down Inoue so in the later round he suffers the power of Inoue.
The Nicholas Walters fight is very different for Donaire, that's the first time that he goes up in weight and challenge the champion. And clearly he was out of his league as he gets knock out by Walters. But when he fights his division, he can clearly won.
So it's different style and we can't compare Donaire and Casimero. Rigo is a very slow starter while Casimero will go out in the first early rounds and really try to overwhelm his opponents with power punches.
Yes, Donaire tries to go up to follow the success of Manny Pacquiao but he failed, he really can't duplicate Pacquiao as he is the only one. Donaire will soon retire but we will never forget his contribution to boxing and we will always be proud of him.