1. 1. Object-Relational Mapping (ORM): GORM is a specialized ORM tool for the Go programming language, while SQLAlchemy is an ORM tool for Python. Both GORM and SQLAlchemy provide a high-level, object-oriented interface to interact with databases. GORM focuses on simplicity and ease of use, while SQLAlchemy provides a more flexible and powerful ORM framework.

2. 2. Query Language: GORM uses a simplified query language called GormQuery, which is designed to make it easy to build and execute database queries. On the other hand, SQLAlchemy uses a powerful SQL-like query language called SQLAlchemy Query Language (SQLAlchemy SQL), which allows for complex querying and manipulation of data.

3. 3. Relationships and Associations: GORM provides a simple and intuitive way to define and manage relationships between tables by using struct tags. SQLAlchemy, on the other hand, provides a more extensive and expressive way to define relationships using its Object Relational API (ORM API). SQLAlchemy supports a wide range of relationships, including one-to-one, one-to-many, and many-to-many.

4. 4. Data Validation: GORM provides built-in support for data validation using struct tags. It allows developers to specify various constraints on the data, such as required fields, data types, and custom validation functions. SQLAlchemy, on the other hand, does not provide built-in data validation. Developers need to handle data validation separately, either using custom validators or third-party libraries.

5. 5. Database Connection Management: GORM provides a built-in connection pooling mechanism, which helps manage database connections efficiently and improves overall application performance. SQLAlchemy, on the other hand, does not provide a built-in connection pooling mechanism. It relies on external connection pooling solutions, such as Connection Pooling API provided by the underlying database driver or third-party libraries.

6. 6. Supported Databases: GORM supports a limited number of databases, including MySQL, PostgreSQL, SQLite, and SQL Server. SQLAlchemy, on the other hand, supports a wide range of databases, including all the databases supported by GORM as well as Oracle, DB2, Firebird, Informix, and more.

In Summary, GORM and SQLAlchemy are both ORM tools, but GORM focuses on simplicity and ease of use, while SQLAlchemy provides more flexibility and power. GORM uses a simplified query language and provides built-in support for data validation and connection pooling. SQLAlchemy offers a powerful SQL-like query language, extensive relationship management capabilities, and support for a wider range of databases.