I'll open this thread to collect ideas and informations about similar or different settings of the cast and world of Mirai Nikki and Big Order.
Feel free to post your ideas concerning these two series' and their similarities and differences.
Let's see if we can collect them in a list.
Those who have not read both series' yet, be alert that there may be many spoilers ahead, so please read with caution to not spoil your fun in the future.