1. Customization Options: Google Sites offers limited customization options compared to Zyro, allowing users to choose from a set of pre-designed templates with restricted editing capabilities. In contrast, Zyro provides extensive customization features like drag-and-drop functionality, the ability to add custom code, and the option to create a unique design from scratch.

2. E-commerce Capabilities: While Google Sites lacks built-in e-commerce functionality, Zyro includes integrated e-commerce tools that enable users to set up online stores, accept payments, and manage inventory effortlessly. This makes Zyro a more suitable platform for users looking to establish an online store or sell products/services.

3. SEO Tools: Zyro comes with advanced SEO tools and features to help users optimize their websites for search engines. On the other hand, Google Sites does not offer robust SEO capabilities, making it less effective for improving search engine rankings and visibility online.

4. Support and Customer Service: Zyro provides 24/7 customer support through live chat, email, and a knowledge base, ensuring that users receive timely assistance and guidance whenever needed. In comparison, Google Sites may have limited support options, leading to potential delays in resolving issues or queries.

5. Integration with Other Platforms: Zyro offers seamless integration with popular third-party platforms, such as social media networks, email marketing services, and analytics tools, enhancing the overall functionality and connectivity of the website. In contrast, Google Sites may have limitations in terms of integrating with external platforms, potentially hindering the website's performance and user experience.

6. Mobile Responsiveness: Zyro is designed with mobile responsiveness in mind, ensuring that websites created on the platform are optimized for various devices and screen sizes. While Google Sites also supports mobile responsiveness, the level of customization and control over the mobile layout may be limited compared to Zyro, impacting the user experience on mobile devices.

In summary, while both Google Sites and Zyro offer website-building capabilities, Zyro stands out for its extensive customization options, e-commerce features, SEO tools, customer support, platform integrations, and mobile responsiveness.