H2

Both series are the work of the brilliant Adachi, Mitsuru. Both shows revolve around high school baseball and involve both elements of romance and sports. The characters and their relationships also have a similar feel..... 

Both are great pieces of work from Adachi, Mitsuru. Though Touch is better just because it is longer and the plot has plenty more time to develop. H2 has the same vibe as Touch and the "main" girl look alike. If you just got done with Touch watch H2 you won't be disappointed.  

In both animes the main characters create a new baseball club. 

Baseball anime, both main characters are elite in baseball and take teams from nothing to victory... 

they are both baseball anime that not only focus on the sport, but in how the relationship of the mc with the people around him evolve. 

Both are from the same author. If you watched one you'll feel right at home watching the other. Both stories feature 2 male leads and 2 female leads. But in Mix the main characters' relationships are like siblings whereas in H2 they're more like really good friends. They all have similar goals and relationships so these shows will feel pretty familiar. Like Mix Season 1, H2 is an incomplete adaptation of its source material. But Mix will get a Season 2 in 2023 whereas H2 only has a live-action adaptation that follows the manga from beginning to end.  

Baseball anime, both main characters are elite in baseball and take teams from nothing to victory... 

It's very general sort of similarity, but they're both baseball animes. ;) And if you like baseball animes, you should watch Oofuri! 

They both are about one guy taking a really bad baseball team and trying to take them to koshien.