How is it different from Heroku Review apps? (https://devcenter.heroku.com/articles/github-integration-review-apps https://devcenter.heroku.com/articles/github-

How is it different from Heroku Review apps? (https://devcenter.heroku.com/articles/github-integration-review-apps https://devcenter.heroku.com/articles/github-integration-rev...)