Comparison of Locke and Hobbes
With respect to H&L: contrast their states of nature (locke has both a state of nature and a state of war); do emphasize the difference in their concepts of rights; contrast H's imperative of safety/security with L's emphasis on justice and values.
You might play with H's sense of expectation vs. L's sense of trust.
Careful on Loke's sense of rights and powers — certainly Hobbes has that perspective. Locke's is a bit more ambiguous.
What about their similar and different views of political legitimacy — consent, representation, authority.
What is the role of government for each? Who is the sovereign?