There is no simple answer to this question as it depends on a number of factors, such as your budget, technical abilities, and the features you are looking for in a website builder. However, we can compare the two platforms on a few key points to help you make a decision.
Shopify is a paid platform, starting at $29 per month. It offers a comprehensive set of features, including a customizable platform, a powerful ecommerce engine, and a wide range of integrations. It is also one of the easiest platform to use, making it a good choice for businesses that are just getting started with online selling.
Wix, on the other hand, is a free platform. It offers a less comprehensive set of features than Shopify, but it is much easier to use. This make it a good choice for businesses that want a simple website and don't need all the bells and whistles of a more comprehensive platform.