In general, it does not matter what brand of toothpaste you use as long as it contains fluoride.  However, in some instances, certain people can benefit from different kinds of toothpaste.  For example, someone with wear and erosion on their teeth should use a less abrasive toothpaste and someone with a lot of staining should use a more abrasive toothpaste.  If you are unsure you can ask your Dentist or Hygienist and they will help guide you toward the most appropriate product for your needs.