Shopify and Magento are both popular e-commerce platforms, but they have differences in their capabilities, particularly when it comes to selling products in high quantities:

1. Scalability: Magento is known for its scalability and ability to handle large product catalogs and high traffic volumes effectively. It offers more flexibility in managing complex product structures and handling large inventories compared to Shopify.

2. Customization: Magento provides greater customization options, allowing businesses to tailor their online stores to specific requirements, especially when dealing with high quantities of products with diverse attributes and variations. This flexibility makes Magento a preferred choice for businesses with unique or complex selling needs.

3. Performance: Magento typically requires more robust hosting and server resources to perform optimally, especially for larger stores with high traffic and extensive product catalogs. Shopify, being a hosted platform, offers optimized performance out of the box, but it may have limitations in handling extremely large inventories or complex product structures.

4. Cost: Shopify tends to have lower upfront costs and simpler pricing structures compared to Magento, making it more accessible to small and medium-sized businesses. However, Magento's open-source nature allows for greater control over hosting and infrastructure costs, which can be advantageous for businesses with high sales volumes.

5. Features and Extensions: Both platforms offer a wide range of features and extensions to enhance the functionality of online stores. Magento's extensive marketplace (Magento Marketplace) provides a vast selection of extensions and integrations, offering advanced capabilities for managing large-scale e-commerce operations.

In summary, while both Shopify and Magento can handle selling products in high quantities, Magento may be better suited for businesses with complex product catalogs, extensive customization needs, and a focus on scalability and performance. Shopify, on the other hand, offers simplicity, ease of use, and cost-effectiveness, making it a popular choice for smaller businesses and those with straightforward selling requirements. Ultimately, the choice between Shopify and Magento depends on factors such as business size, budget, customization needs, and long-term growth plans.