They way I've seen it described is that BSD is designed, Linux is grown.
Every part of BSD is from BSD. The kernel, network stack, init system, userland, sshd, etc are all made and released together. Ideas are driven by teams and committees and then implemented.
Every part of a functioning Linux system is from a different vendor. "Linux" makes the kernel and network stack, the init system comes from the FreeDesktop project, the userland comes from GNU, sshd comes from BSD. Things are driven in a variety of different ways, by different people, with different goals and thoughts on how Linux should look. Eventually it all gets glued together and we see what we've got.
Every part of BSD is from BSD. The kernel, network stack, init system, userland, sshd, etc are all made and released together. Ideas are driven by teams and committees and then implemented.
Every part of a functioning Linux system is from a different vendor. "Linux" makes the kernel and network stack, the init system comes from the FreeDesktop project, the userland comes from GNU, sshd comes from BSD. Things are driven in a variety of different ways, by different people, with different goals and thoughts on how Linux should look. Eventually it all gets glued together and we see what we've got.