Seeing this show go under the radar for many people reminds me a lot of how when Tsuki ga Kirei was airing, it seemed like not many people were talking about it, but it was one of the best character-driven stories of the season. Both shows are understated in art style, dialogue, and soundtrack, and they have realistic and dynamic characters similar to actual people you'd see in high school. If you liked that the mellow storytelling and atmosphere of Tsuki ga Kirei, you'll probably like Hoshiai no Sora.
The two shows are both originals that take place in a middle school setting. The art styles are very similar in aesthetic and mood, done by feel. and 8bit respectively. One is a romance while the other is a sports drama, however, they both have a pretty laidback narrative.
A hopeless group of young men trying to reach a difficult goal? Yes, both series have it. If you like sports anime with well written slice of life elements to it then both are for you.
The differences are that Kaze students are in college while Hoshiai takes place in middle school. Also Running versus Soft tennis.
Yet they share the similar vibe in character interactions and difficult backgrounds.
Both shows are a more serious, emotional take on your typical sports anime. The start setting is also similar: A talented person persuaded by the desperate captain joins a club full of not so motivated sportsmen, who mostly despise the talented person at first. However as time passes, the club members start to get closer.
Both shows have similar vibes, they both have a gloomy kid who gets invited to join the sport team that is weak. and have other similarities, one is about baseball and the other is about soft tennis though.
Two boys team up to achieve a goal. Not to mention: the boys from either shows look quite similar (one is darker haired, other lighter haired and has glasses). Both series have a realistic setting. Since they share a familiar vibe in those regards maybe you will like Hoshiai no Sora if you liked Bakuman.
However, Hoshiai no Sora setting happens in middle school and there's also more team members.