DRM is mostly about cryptography, and it can change from a version of the software to another. The final result in both machines must depend on how many pressure the e-book sellers are able to put upon the shoulders of software development. Amusingly, both machines can be expected to be binary compatible for statically linked software, so in theory even third party developers could release a common DRM platform.
What there is not, is DRM specific hardware. Here is where I should put my barrier to buy a device.
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