Divergence Eve

A SciFi that involves losing their humanity and becoming something more. Both are mysterious and have mc that get unique powers in their respective universes. They have a similar aesthetic when it comes to the CGI techniques employed during much of the combat/action that if you enjoyed one, you would definitely enjoy the other. 

Character-driven horror with ecchi character designs. 

Both shows look like a experiment that gone wrong in some aspects, but the it achieves some unexpected memorable results, in a good way. 

Both are among the very few anime to be genuinely creepy in a horror sense 

Both this anime have aliens that invade from a different space time by human using some kind of object which is not necessary to use. The alien act very similar too. In Xenosaga there is a android woman who posses mysterious powers while in Divergence Eve there is a girl with supernatural power. That is also similar because both of them have some kind of superpower. 

These two have almost identical plots and similar sci-fi apocolypse themes. Geneshaft also has a massive amount of girls, much like Divergence Eve. 

Great, realistic aerospace theme, but none of the wacky aliens to deal with. Lots of interesting characters, but none of them have gigantic, distracting boobs.