- PHP stack traces are shown in the browser
- XML files are validated againts their schemes
- Static assets are created on the fly
- X-Magento-* debug headers are added to responses
- Debug logging can be enabled
- Static asset minification and bundling not applied
- Static assets are not created on the fly (unless configured static_content_on_demand_in_production => 1 )
- PHP Stack traces are hidden
- XML files with errors are silently ignored
- Caching can not be disabled in the admin
- Debug loggin is always disabled
- Developer section of Stores -> COnfiguration -> Advanced is hidden