For mold that is on a hard surface, such as tile, bleach will kill it. For porous surfaces, such as wood, vinegar will penetrate some and have a more prominent effect. For surfaces like drywall, neither one will eliminate the problem. If you see mold on your wall, you only see a tiny part of the whole problem, which is well beyond what bleach or vinegar can handle. To ensure that all the mold is gone for good, professional mold removal is the answer.