code: public static List<CmsAttributeComparison> filterDifferent(List<CmsAttributeComparison> comps) {
  
          return Lists.newArrayList(Collections2.filter(comps, new IsAttributeDifference()));
      }
docs: Only selects the attributes comparisons that actually represent differences.<p>
  
  @param comps the attribute comparisons
  
  @return the list of attribute comparisons which correspond to actual differences