We actually do know what each one was built for. Rails was originally used to make Basecamp. The closer in functionality your app is to the apps the core team b

We actually do know what each one was built for. Rails was originally used to make Basecamp. The closer in functionality your app is to the apps the core team builds, the better Rails fits. Django was originally a CMS for a news site, so it's no surprise it's stayed good for that.