Hi,
It is logical that shorter cycles are more dynamic, because they change faster. So the statment of being more dynamic only means to emphasize that they are shorter. ( it does not mean that they are stronger, but it may mean that it would take less time for them to manifest, and also to stop manifesting)
Regarding strenght I would say that I remeber from the course that Marie stated that yearly stars are stronger than the 20-y cycle statrs.
At least, that is how I understand it at his moment.
