Penguins are the most beloved flightless birds whereas puffins are cute little birds that can fly. Penguins and puffins are distant national. Penguins are the habitat of the Southern Hemisphere while puffins are endemic to Northern Hemisphere. They are related only in one aspect that is with their similar black back and white front body.
Penguins belong to the family Spheniscidae, where puffins belong to the family Alcidae. Puffins are distinct from penguins with their size, flying ability, swimming efficiency, appearance, and other characteristics. But they may share a similar diet since puffins are also marine birds.