@neil
Enormous difference! Here's a (tendentious, materialist, contra-idealist) interpretation . .
Digital commons is a (the?) commons centred on digital media and digital devices - might include many kinds of automation, guidance of material systems, provisioning and transportation of material goods etc. bringing a major focus on the digital capability and literacy of the commoners. It's a material commons of code, devices, media, enabled and stewarded by cultural capability (aka skill)
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