No problem! To my knowledge, I don't think Cockshott was associated with the Cybersyn project, but his name is associated with socialist cybernetics generally. I'd say the difference between them is that Beer's work is more concerned with broad ideas of system design and how systems work (especially the Viable System Model), while Cockshott's work is more of a grab bag of ideas to implement in a hypothetical socialist society. I haven't listened to or read everything of Cockshott though so maybe I'm not giving him a fair shake, but that's my impression based on what I have seen of his so far.

Oh also, while it's not as in depth as Beer's stuff and is a little lib in some parts, The People's Republic of Walmart is a great book imo as an introduction to socialist economic planning and how it could work with modern tech. I'd definitely recommend it if you're looking for good intro material about the topic.