Youd actually lose weight quicker if you would run in the morning for 9 minutes and then walk at night after your meal. Your metabolism will increase greatly. You can look at my profile and click on the websites to find good diets if your interested.
Running a mile and walking a mile burn the same number of calories. Moving a weight over a set distance always requires the same amount of work, just takes longer.
Run. Will get you in better shape and burn more fat.