Both 'systems' have more in common then not, to give a name to them the '7' is more about the movement of light, the structure of all, the cycles (0 7 (8) 1 0 ) , the '12' more about character development, the path to mastership (13)(the middle of 13 = 7 )
The '7' was also 'known' in Egypt as was the '2'. Different fractals.
All is connected, the outside world is the inside world. Because of that every action affects the whole.
Cause / effect is not limited to our limited ego perspective though we might think so. The weaker / smaller, the stronger it will affect us and we don't even know what has us by the balls, because we can't measure it, can't see it, so it doesn't exist for us.
Just look at earth and the planets in our system, all are warmed up ... from inside.