>>3880911He's cute but kind of generic. I like how the manga version of him was smart enough to figure out Ryo's plan before the sabbath, but loved Ryo enough to go along with it anyway despite being such a coward. And he was able to figure out Ryo's true identity on his own, you really got a sense of how well he understands Ryo. Meanwhile Crybaby Akira seemed like he was only going along with Ryo's plans because he was too stupid/naive to know any better.
Another thing is the complete overhaul of Miki's character and her relationship with Akira. Everyone always blames Ryo for indirectly causing Miki's death, but if you read the manga you see Akira constantly abandoning her for Ryo without a second thought. This is emphasized in Shin Devilman, where each chapter ends with the death of a woman who could have been saved. This is something that none of the anime or manga spinoffs get: If manga Akira had loved and cherished Miki as much as he did in Crybaby, then he wouldn't have wasted so much time going over Ryo's words and actions in his head before suddenly remembering her existence. He would have gone to her immediately after killing those scientists and he would have protected her. In Crybaby, you get the sense that even without Miki's death he still would never have even considered siding with Satan, he was just too heroic.
Sorry, this is getting too long. I just love analyzing my boys.