Pecans are oval with a smooth, elongated shape, while walnuts are round with a more rugged, irregular form.
Pecans have a rich, buttery flavor, whereas walnuts have a more bitter, earthy taste due to their higher tannin content.
Walnuts are higher in omega-3 fatty acids, while pecans are richer in antioxidants and vitamin E.
Pecans have a crisp, crunchy texture, while walnuts are more delicate with a soft, slightly grainy feel.
Pecans are easier to crack with a thinner shell, while walnuts have a thicker, more durable shell and a wrinkled surface.
Pecans are often used in desserts like pies, while walnuts are more common in savory dishes and salads.
Pecans are native to North America, while walnuts are thought to originate from Asia and Europe.
Pecans have a higher fat content, specifically monounsaturated fats, while walnuts contain more polyunsaturated fats.