Subgraph OS is an open source, security-focused operating system designed to protect users from a wide range of digital threats. It is based on Debian Linux and is designed to be easy to use and maintain. Subgraph OS includes a number of unique security features, such as a firewall, sandboxing, and application control, which make it more secure than other operating systems. It also includes a number of built-in applications and utilities, such as a web browser, email client, and office suite, making it a complete operating system for users. Subgraph OS can be installed on a variety of hardware, including desktop computers, laptops, and servers, and is designed to be simple to use for both technical and non-technical users.
Both come with the same purpose, I'm sure. Others were just a normal monolithic system.