Doctrine 2 vs Sugar ORM: What are the differences?

Doctrine 2: An object-relational mapper (ORM) for PHP 5.3.2+ that provides transparent persistence for PHP objects. Doctrine 2 sits on top of a powerful database abstraction layer (DBAL). One of its key features is the option to write database queries in a proprietary object oriented SQL dialect called Doctrine Query Language (DQL), inspired by Hibernates HQL; Sugar ORM: A database persistence library that provides a simple and concise way to integrate your application models into SQLite. It is a database persistence library that provides a simple and concise way to integrate your application models into SQLite. It eliminates writing SQL queries to interact with SQLite db.

Doctrine 2 and Sugar ORM can be primarily classified as "Object Relational Mapper (ORM)" tools.

Sugar ORM is an open source tool with 2.61K GitHub stars and 614 GitHub forks. Here's a link to Sugar ORM's open source repository on GitHub.