Game system upon creation of a world

[Vampyre]

Hello all,

I've just noticed that upon the creation of a new world, there is now the possibility to pick a game system on which this world is based on. I've just tried it, but I don't see at all what changes in a default world based on a specific game system. I've tried created a Savage Worlds settings, but I don't notice anything different.

Care to explain what this exactly does ?

Thank you !