title: In Rails, what is the difference between installing a gem, and then rake gems:freeze into the vendor folder vs installing it as a plugin?
body: <p>Both methods put the gem into the project's folder to be a self-contained project.  Is there advantage / disadvantage of these methods or one better than the other method?</p>
  
  <p>(the project is a Rails 2.2 project, so can't use Bundler)</p>