title: AWS S3 bucket logs vs AWS cloudtrail
body: <p>What's the difference between the AWS S3 logs and the AWS CloudTrail? 
  On the doc of CloudTrail I saw this: </p>
  
  <blockquote>
    <p>CloudTrail adds another dimension to the monitoring capabilities
    already offered by AWS. It does not change or replace logging features
    you might already be using.</p>
  </blockquote>