Instant noodles and soba noodles have their own advantages and disadvantages, so it is impossible to simply say which is healthier. However, you can compare them in the following ways:

1. Nutritional value: Soba noodles are made from pure buckwheat and are rich in protein, fiber and vitamins, which are good for your health. Instant noodles, on the other hand, usually contain ingredients high in oil, salt and sugar, with high calories and relatively low nutritional value.

2. Healthy: Buckwheat instant noodles do not contain preservatives, sulfur and other harmful chemicals, compared to ordinary instant noodles are safer and healthier. However, ordinary instant noodles are widely concerned about health hazards due to the presence of starch-converting substances and preservatives.

3. Preparation: Soba noodles usually need to be cooked and eaten, with a natural taste and flavor. And buckwheat instant noodles is a fast food products, only need to heat it can be eaten, has the characteristics of convenient and quick.

In summary, if you are looking for natural ingredients and healthier dietary choices, it is recommended to choose soba noodles. If a quick and easy food solution is needed, buckwheat instant noodles can be preferred. Whichever you choose, it is recommended to keep variety in your diet and combine it with other healthy ingredients to ensure you get balanced nutrition.