eli5 difference between keto diet and low calorie balanced diet

Question

Suppose we bring an identical twin with same bmi the first one started keto diet with 2000 kcal/day
The other one started balanced healthy diet also with 2000 kcal/day both of them wants to lose weight with sedentary life style.what will happen after three months to their weight on the scale and will they lose the same amount of fat?

In: 2

Answer 1

I would say the one who did keto would weigh less, mostly because they would have less water retention.