It is the year 2356 AD, 189 years after a shockwave from a distant supernova decimated the Earth. Since that fateful day, humanity has begun training for a final mission to protect the planet from the inevitable oncoming 2nd shockwave - a mission whose failure means the annihilation of mankind. For Katase and her friends, their training at the foundation Stellvia is just the beginning of an adventure that could lead to saving the world, or seeing its end...
The god Mauser delivered unto a world of magic a prophecy: if the Scrapped Princess is allowed to live, she will destroy the entire world. But the knight who was to kill her could not end the life of a newborn child, and so she lived. Fifteen years later, her adopted brother and sister have sworn to protect her, and together they travel from town to town, searching for a life she can't have.
Both of these series have a very similar feel -- they both have a sunny, cute, and slightly foolish protagonist that has to face very serious problems -- however, they both have close friends to help them.
Additionally, the animation and overall "feel" of the series seems stylistically very similar.
Misaki Suzuhara is a young girl who traveled to Tokyo to live with a relative, but ended up becoming involved in the greatest game of all time: Angelic Layer! In this fast-paced competition, players customize dolls and fight them in arenas of all sizes, hoping to gain experience and perhaps win the greatest tournament of them all! With new friends to meet and new enemies to defeat, the best time of Misaki's life seems to be just beginning. Join Misaki as she struggles to be the best, even in the face of overwhelming odds...
The main characters of both series are very alike, both are unsure about failing and make mistakes because of it. They go through training while dealing with these hardships and make themselves stronger. Stellvia provides more story than Angelic Layer, though.
Angelic Layer and Stellvia of the Universe share the common lesson of working hard. The more you practice something and show what you can do the better you will become, no matter what anyone says! With a good group of friends by your side and your spirits high anything can improve and anything can happen.
What happens when authority and consequence are removed? When the inmates truly run the asylum. On the spaceship Ryvius there are those who would fight for order, and many more who would fight to destroy it. Love, hate, anger, greed, avarice, and perhaps hope are the fuel for the Ryvius, and only one can save those who call it home...
Both Stellvia and Ryvius have characters that are put through "tough" situations. They are also both sci-fi themed and have the same sort of feel, although Ryvius is much more harsh. I believe that both are great shows and if you liked one you would like the other.
Stellvia and Ryvius both take the question of what happens to children when they're separated from everything they know, thrust into a completely new enviroment (space!), and are forced to find their own means of dealing with the dangerous situations that arise.
In a far and distant future, men and women have become mortal enemies. Each living on seperate planets, an interstellar war is being fought between the two very different peoples. Hibiki, a mere 3rd class worker, finds himself in the middle of a huge space battle, facing the nemesis of mankind: Womankind!
Both Vandread and Stellvia are about space, but both put an emphasis on the characters. To protect their friends everyone goes through trials so they can become stronger.
If you enjoy space anime then you might want to check out Vandread and Stellvia of the Universe. Both of these anime start out in a happy atmosphere, but as the series progresses it becomes more serious. They both have a good amount of comedy mixed in but Vandread tends to have a bit more ecchi. :P
In the distant future, aliens called Victim destroyed all the worlds of humanity except for Zion. In this desperate time, young boys of the space colonies are sent to GOA to learn how to, and compete for the right to, pilot the fighting machines designated as Ingrids. These child pilots are assisted by EX -- a special power, and by female partners who repair the Ingrids. However, to save humanity, exceptional candidates are needed, and two new students, Zero and Hiead, motivated by their desire to succeed and burning rivalry, may be the human race's last hope...
Both series is a type of mecha series where the main characters is trying to reach an alike goal in mind to become a plot, but along the way they endure harship, also their personality develops and makes life long friendships along the way. If you like this one you will surely enjoy the other.