1. Deployment Monitoring: PgHero focuses on monitoring PostgreSQL database performance, allowing users to identify slow queries, missing indexes, and bloated tables. RailsAdmin, on the other hand, is a general-purpose administration interface for managing database records and relationships in a Rails application.

2. Customization Options: PgHero offers limited customization options as it is primarily focused on database performance monitoring. In contrast, RailsAdmin provides extensive customization capabilities, allowing users to tailor the admin interface to suit their specific needs and preferences.

3. Security Features: RailsAdmin includes a role-based access control feature that enables administrators to restrict access to specific parts of the admin interface based on user roles and permissions. PgHero does not have built-in security features for controlling access to database performance monitoring functionalities.

4. User Interface Design: RailsAdmin features a user-friendly interface with various built-in themes and styling options for customizing the look and feel of the admin interface. PgHero, being more focused on database monitoring, has a simpler interface designed for efficiently analyzing and optimizing database performance.

5. Data Visualization Tools: PgHero offers various data visualization tools such as query analysis charts and performance metrics graphs to help users quickly identify and address performance issues in their PostgreSQL database. RailsAdmin, on the other hand, does not provide built-in data visualization tools for monitoring database performance.

6. Automated Performance Suggestions: PgHero includes automated performance suggestions and recommendations based on database analysis to assist users in optimizing their PostgreSQL database for better performance. RailsAdmin does not offer this feature as it is primarily an admin interface for managing database records.

In Summary, the key differences between PgHero and RailsAdmin lie in their primary focus on database performance monitoring and administration interface customization, security features, user interface design, data visualization tools, and automated performance suggestions.