Democracies are different from each other. There are many ways you can build a society from the same basic principles.

One key difference is the extent the authorities have discretionary powers. Can they do whatever the consider necessary to do their jobs (until the courts tell otherwise), or do they only have the powers explicitly given by the law? Common law systems tend to favor discretionary powers, but they vary on how eager the courts are to keep the officials in check. Civil law systems can be anywhere on the spectrum, but it's usually a legislative choice made in advance rather than a judicial choice made after the fact.