What have you improved (volunteer hours, clinical experience, research, interview skills, writing, etc)? If nothing changed, then schools will look at you and wonder why you did not do anything to improve your app over the course of a year. If you add significant improvements, they will see that you are working to address deficits and make yourself even more competitive, which they like.
Many schools love reapplicants as they can see how they improved based on an unsuccessful cycle and see perseverance (medical school, residency, and being a doctor will continue to knock you down and they want to see if you can react). Some schools only allow reapplying to their school once.