I watched both anime and both have almost similar traits in almost all aspects of baseball , except the them , where Ookiku focused tends to realistic-friendship wise , and Daiya no ace more to individuals term. However , if you like Daiya No Ace , I am sure you would also interested in Ookiku Natsu N.T.H.(theres a prequel too)
They are similar in that way both are about sport in high school and that the main charter grows alot on a personal level and gets better at the sport they are playing!
so if you like Eyeshield 21 then i think you would like Ookiku Furikabutte aswell!