i took the freedom to ask. here’s the answer in german:
Leider haben wir noch keine näheren Infos zu den Inhalten, Unterschieden oder Terminen
translated it means: unfortunately we have no further information regarding content, differences and dates.
so i think this is the same as everywhere, none of the marketing guys have a clue. they use random dates and fictive goods to make people preorder the game at their store.
if only one of the devs would open up, even a photo of the office plant which they used as a lighting example as described in one of the articles would suffice for a starving ET junkie 