1. Cost Structure: One key difference between Google Cloud Storage and Storj is their cost structure. Google Cloud Storage follows a traditional pricing model where users pay for the amount of data stored and the transfers made. On the other hand, Storj offers a decentralized and peer-to-peer network where users can earn or pay for storage based on the resources they contribute, making it potentially more cost-effective for certain use cases.

2. Data Distribution and Redundancy: Google Cloud Storage uses a centralized infrastructure to store and distribute data across multiple data centers, ensuring high availability and durability. Storj, on the other hand, utilizes a decentralized architecture, leveraging a network of nodes to store and distribute data, providing redundancy and fault tolerance through its distributed network.

3. Security and Privacy: While both Google Cloud Storage and Storj prioritize security, there are some differences in their approach. Google Cloud Storage provides features like at-rest and in-transit encryption, IAM (Identity and Access Management) controls, and integration with other Google Cloud services for authentication and authorization. Storj, on the other hand, ensures security through client-side encryption, where data is encrypted before it leaves the client's device and only the client holds the encryption keys. This decentralized approach provides enhanced privacy and control over data.

4. Scalability: Both Google Cloud Storage and Storj offer scalable storage solutions, but the way they achieve scalability differs. Google Cloud Storage provides automatic scaling as per user demand, allowing users to seamlessly scale their storage capacity without worrying about infrastructure management. Storj, being a decentralized network, can leverage the unused storage resources of its node operators, enabling it to scale by adding more nodes to the network as the storage demand grows.

5. Integration and Ecosystem: Google Cloud Storage has a comprehensive ecosystem and integrates well with other Google Cloud services, enabling users to build complex applications and workflows. Storj, although less established, has been developing integrations with popular platforms and tools, providing options for developers to leverage the Storj network in their applications.

6. Data Transfer Speed: Another difference is the data transfer speed between Google Cloud Storage and Storj. Google Cloud Storage benefits from Google's global infrastructure, allowing for high-speed data transfers within its network. Storj, being a decentralized network, may have varying transfer speeds based on the locations and network conditions of the individual nodes storing the data.

In summary, Google Cloud Storage and Storj differ in their cost structure, data distribution and redundancy approach, security and privacy measures, scalability mechanisms, integration and ecosystem support, as well as data transfer speed. Choosing between these two storage solutions depends on specific requirements, such as budget, data privacy concerns, network architecture preferences, and integration needs.