When deciding between cloud storage APIs or SDKs for your project, there is no definitive answer as it depends on your requirements, preferences, and constraints. Complexity, language, performance, and documentation are all factors to consider. For instance, if your project involves simple operations, such as storing and retrieving files, then you may prefer SDKs to save time and effort. On the other hand, if your project requires high performance and efficiency, then APIs may be a better choice to optimize requests and responses. Additionally, if your project needs clear and comprehensive documentation from the cloud storage service, then SDKs provide access to the official and updated documentation. However, if you want to use your own or third-party documentation, then APIs may be more suitable.