The problem with Ippo's anime is the animation, in the first Madhouse series in 2003 you can see the presence of repeated frames and camera movements that try to simulate the action, the director thanks to the different perspectives managed to give more frenzy and tension to the action; All this becomes worse with the later series, there is an awkward static ( at the levels of Ao ashi or Ahiru no Sora maybe), it manages to compensate with the characters and the plot, but in my opinion, there is a limit to how much you can take, but that will depend on you. The Manga although it can be scary because of the number of chapters, but you read them quickly, and without realizing it you end up catching up, this is due to the way George Morikawa tells his characters and the story in a realistic and never predictable way. The drawings were already very good when he started, but as time went on he managed to improve them further, making them cleaner and making certain panels breathtaking. Finally, by adaptation, the anime does not differ much from the manga, although it is obvious that it omits details that can enhance the characters' background and the storyline of the fights more.