Where are most of the worlds penguins located?
Antarctica and islands surrounding it, south america, africa, and oceania.
The most obvious difference is flight. Penguins can't fly and puffins can. Puffins have longer feathers and don't live in the cold places that most penguins do. Most penguins are larger than puffins. Puffins have short, stubby, colorful, conical bills while penguins have longer, pointier bills. Puffins have pointy feathers behind their eyes and penguins don't. Try to look up images of penguins and puffins and compare the difference.