Yeah I know. Baki has two seasons if I remember right and first one is very unlike Ippo, but if I remember right when they get on Arena part, there is going to be specific explanations about what is happening inside fighter's body and that's kinda what Ippo does.
Grappler Baki is good fighting anime and basicly people who like Hajime no Ippo usually like Grappler Baki too.
Similarities are in little things when in general they are really different type of fighting anime.
Thanks for the Grappler Baki rec Only watched the first couple of episodes and the plot is pretty interesting, almost like Kenichi except he's already tough as hell to begin with. Thought Baki was totally different from Ippo in the first episode until the second and third episodes but anyways, better continue watching I guess xD Thanks again.