3.917 out of 5 from 35 votes
Both manga feature a godess who lacks common sense and likes to goof around as the female lead and a human boy who likes to keep his cool as the male lead. Both series are fun, so if you liked one, you'll probably like the other one too.
Those series feel somewhat similar, I can't really tell why, so let's call it "gut feel" for now. The main characters in both series are very different from your generic senien and shounen ones. I can't give a 100% guarantee, but it's highly possible that you will like one of the series if you liked the other one.
If you liked the relationship between the main duo from one of those two manga (Darumiru and Ariyuki in Suashi no Meteorite and Vanilla and Rikuo in Come Come Vanilla!) than you could try reading the other one too. Basically in both of those sries a guy has to take care of this somewhat adorable girl.
All Shinta wants is to find a girlfriend, and constantly falls in 'love at first sight' with his classmates. Unfortunately for the boy, none seem to reciprocate his intense feelings, and thus, he does the only thing he can think of – he visits a local shrine to hopefully have his wish granted. Much to his surprise, Shinta encounters a god at the shrine who decides to grant his wish, and the next morning, Shinta wakes up next to the lovely goddess Isana. But all wishes come at a price – it's that time of year when gods throughout the world battle it out for territory, and each deity like Isana must use a human as their champion. Now, Shinta must fight countless enemies for his newfound girlfriend, even though she doesn't seem to want to give him the time of day!
Yuuhi Amamiya is a loner whose mistrust of people was instilled in him at a young age by his abusive grandfather. So when an annoying talking lizard tells the university student that he is one of twelve knights chosen to stop the gigantic "biscuit hammer" before it smashes the Earth to smithereens, Yuuhi has no inclination to rescue such an unkind world. Despite his apathy, the boy is targeted by a golem while going about his day-to-day life, and ends up teaming up with the other knights anyway. One of his new companions is Samidare Asahina, the "princess" and leader of the knights, who secretly is only trying to protect the Earth so she can destroy it herself! Entranced, Yuuhi swears eternal loyalty to this cheerful devil that promises to crush the world he despises.
If you liked the male lead in one of those two series, you might like the other series as well. They both have a similar attitude towards the supernatural mess they found themselves in. Both of those manga are post NGE series. However neither of them tries to actually copy NGE (like many other post NGE series do). Instead they offer a nice mix of comedy, awesomeness and drama. There are also other similarities which I can't really describe, but which make those two series resemble each other even more.