Registering for PC and PS3

[Demeos]

Ok, thank you for your answer!
Then I will only play on PC and she will only play on PS3. Better than buying the game 4 times. 2 times is enough, hehe.

But do we need two SE accounts or two service accounts? What's the difference?
I've read that it really works with two service accounts, so why should someone make two completely separate SE accounts?

Both options would require a total of 2 service accounts so either way would work.

...As to why someone would want to have their own SE account?