Ingredients, appearance and taste.

1. Raw materials: Buckwheat noodles are flour made from buckwheat, while oats are flour processed from oats. Although buckwheat and oats are both miscellaneous grains, they are not the same thing.

2. Appearance: The color of buckwheat noodles is darker red-yellow (coffee), while the color of oats noodles is yellowish-white. The texture of soba noodles is rough and has obvious lines, while oatmeal noodles are more delicate.

3. Taste: Soba noodles have a smooth texture and a certain elasticity, while oatmeal noodles have a certain stickiness.