Answer:
In a Federal System of government, there is a strong central government which has the majority of the power.
In a Confederal System, the central government is quite weak and the entities that making up the confeseration, such as a states, are the ones with all the power.
The ems dispatch was edited without adding or changing words, it was only reduced by eliminating some words, which in the end, according to Bismarck, the difference in the effect was not the result of stronger words, but of the form, what made the telegram seem stronger and decisive, while the original version would only have been considered as an unfinished negotiation.
