Atlantic Puffin
Fratercula arctica
The Atlantic puffin is sturdily built with a thick-set neck and short wings and tail. It is 28 to 30 cm (11 to 12 in) in length from the tip of its stout bill to its blunt-ended tail. Its wingspan is 47 to 63 cm (19 to 25 in) and on land it stands about 20 cm (8 in) high. The male is generally slightly larger than the female, but they are coloured alike. The forehead, crown, and nape are glossy black, as are the back, wings, and tail. A broad, black collar extends around the neck and throat. On each side of the head is a large, lozenge-shaped area of very pale grey.
ID text from Wikipedia, CC BY-SA 4.0

Tufted Puffin
Fratercula cirrhata
Tufted puffins are around 35 cm (14 in) in length with a similar wingspan and weigh about three-quarters of a kilogram (1.6 lbs), making them the largest of all the puffins. Birds from the western Pacific population are somewhat larger than those from the eastern Pacific, and male birds tend to be slightly larger than females. They are primarily black with a white facial patch, and, typical of other puffin species, feature a very thick bill, primarily red with some yellow and occasionally green markings.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Atlantic Puffin and Tufted Puffin.