Same director, and there's the same theory of time travel.
They both have romance, but;
> Steins;gate is heavily focused on Okabe's journey to save himself, Makise Kurisu, his friends, and (the rest of the world).
> On the other hand, Orange is focused on Naho's (Main character) redemption of her past self, and also preventing Kakeru (their friend) from taking his own life in being a part of an accident.
Both have decent plots and provides a rollercoaster of emotions for the viewers.
[A small spoiler
================= Even Okarin (Okabe Rintarou) makes a
================= special appearance in in a different