This means absolutely nothing. As has been pointed out in this topic, the two series didn't even notice each other until they were both popular, and while each may have gleaned some ideas from the other, neither blatantly plagiarized anything.
And it's all irrelevant because Megami Tensei is a thing anyway.
We are the champions, but me most of all! Official Eikichi Mishina of all MegaTen boards.