title: Factory(:some_factory) or FactoryGirl.create(:some_factory)
body: <p>Is there any difference between <code>Factory(:some_factory)</code> and <code>FactoryGirl.create(:some_factory)</code>?</p>
  
  <p><code>Factory(:some_factory)</code> was causing <code>ActiveRecord::AssociationTypeMismatch</code> in one controller spec while <code>FactoryGirl.create(:some_factory)</code> was not causing it</p>