I can eat McDonalds everyday for a month and still lose weight.. how?
Order a small fries and a double patty cheeseburger. Eat nothing else during the entire day, drink plenty of water, and exercise for at least 30 minutes.
But it is important in the sense of "which diet is easiest to follow?".
That will vary person to person. But for many people, the answer is low-carb/intermittent-fasting. It eliminates the blood sugar/hormonal response, requires less effort than regular eating, and still lets you eat palatable food.
But most people won't find it easy to regulate their caloric intake eating ramen and chocolate. They will find it much easier with vegetables, lean protein and high fat.