No internet without a doubt. When I first came to my house for the first couple of days there was no heating to speak of which mind you is not how one should find their house. My fingers froze and let me tell you, the internet wouldn't be worth anything if I couldn't feel warm during the cold or cool during a hot day.
The answer is Rhetorical devices
I recommend starting by describing each character and then transitioning into their similarities and differences. I have made an outline for you to follow if you would like to use it.
(Describe characters)
(Similarities)
(Similarities 2)
(Differences)
(Differences 2)
(Conclusion)
This would be a good Essay format for you to follow.
Hope this helped. Have a great night!