1. Architecture: SlushJS follows a modular architecture allowing developers to create and share their own generators, while Yeoman is a scaffolding tool that bundles together generators for common tasks, making it more opinionated in its approach.
2. Configuration: SlushJS uses a simplified approach to handling project configuration, mainly relying on JSON files, whereas Yeoman provides a more flexible configuration system allowing for more complex setups and customizations.
3. Task Runners: SlushJS integrates with Gulp as its default task runner, allowing developers to utilize Gulp tasks within their generators, while Yeoman has built-in support for Grunt but can also work with Gulp or other task runners through plugins.
4. Learning Curve: SlushJS is considered to have a lower learning curve compared to Yeoman due to its simpler and more straightforward design, making it more accessible for beginners or those looking for a quick setup.
5. Community and Support: Yeoman has a larger and more established community with extensive documentation and a wider range of available generators, while SlushJS may have a more limited community and generator ecosystem.
6. Updates and Maintenance: Yeoman is regularly updated and maintained, with a larger team behind it ensuring compatibility with the latest technologies and best practices, while SlushJS may not receive updates as frequently due to a smaller development team.

In Summary, SlushJS and Yeoman differ in their architecture, configuration, task runners, learning curve, community and support, and updates and maintenance.