What are some similarities between Athens and Sparta?

Hey dude!

Well athens and sparta had similar forms of government; both city states were in part governed by elected assemblies. However the top rulers of Athens were elected, in Sparta not. They have both large and powerful armies just that in different areas; Sparta Army was conformed of the best-trained soldiers and powerful warriors in the ancient times, and Athens have also an army as large as the Sparta Army, just that they were dominant in the navy; they had the largest and most powerful navy in the Ancient Greece. Finally, the two city states had a extremely large population of slaves.