What is the difference between governments?

[Reshey]

I tried reading the manual, and did a search in this forum and could not find the answer to this question. What is the best government form? (Does any give more free ukeep garrison)

[Nanook1]

Assuming they kept the same ideas from Empire:
-Republic keeps the lower classes happy, and army upkeep is crazy expensive.
-Monarchy keeps the noble class happy, and army upkeep is cheap. The lower class gets very pissed at you sometimes.
-Constitutional Monarchy tends to keep botch classes happy, with an average army upkeep.

It's probably changed in Napoleon so... don't follow my words