Worthy Wii U/3DS eShop games to purchase before shut down

[Kakadu18]

Metallox said:

Kakadu18 said:

Is it worth it to buy Shin Megami Tensei IV or should I just buy IV Apocalypse?

Some of the stuff in Apocalypse might pass you by if you haven't played IV. Furthermore, I think IV has a genuinely good narrative, it's totally worth it. 

So Apocalypse is not just an upgraded version of IV with more content but a sequel?