How to compare the state structure of Athens and Sparta?

Athens and Sparta in ancient times were considered the most important cities and centers of ancient culture. True, they had a number of differences, including in the management of the state.
The main power in ancient Athens was concentrated among the people, that is, all issues: politics, culture, trade, etc. – were decided at a national meeting. Appointments to government positions were also carried out there.
In ancient Sparta, the king always ruled, in fact, he represented the power, and he made the main state decisions.