We all know a picture tells a thousand words.
And there are at least 16,000 words needed to describe the differences between President Obama and President-elect Trump. So here are 16 pictures to illustrate them.
Maths, people.
1. Let's start easy... How do they both react when they know they're in the right?
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Getty Images
2. Ok, what do they look like when they're deep in thought?

Shutterstock / ChameleonsEye
3. Trying to remain composed is always an important skill
AFP/Getty Images
Getty Images
4. Sports games are the perfect oportunity for a candid snap, compare and contrast.
AFP/Getty Images
Even sitting next to David Cameron doesn't cramp Obama's style
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5. Quick, look away from the leaders of the free world for a moment and focus on their adoring public. What do you notice?
Shutterstock / mikeledray
Shutterstock / lev radin
6. Now back to the world leaders, how do they look when they're mad?
Shutterstock / Evan El-Amin

7. Both show strong pointing skills
Shutterstock / Joseph Sohm
Shutterstock / Evan El-Amin
8. And finally, how do they look playing sports?
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Getty Images
Did we cover everything?
More: The difference between Barack Obama and Donald Trump in two photos?