A light-field camera generally avoids the magnification/parallax changes that come from shifting focus in a conventional camera, because its refocusing is done computationally from one capture rather than by moving focusing elements between exposures.

With a DSLR, changing focus can alter image magnification, so frames in a focus stack may not line up perfectly without correction. If you align the stack well, those differences may become hard to notice in the final result.

So, in principle:

• Light-field refocus does not have the same focus-shift magnification issue.
• A DSLR focus stack can show that issue unless you correct alignment.
• If your DSLR images are properly aligned, the practical visible difference may be small.

That said, a light-field refocus is not identical in how it is generated: it is synthesized from captured directional light information, while DSLR blur/defocus is optically produced by the lens at capture time. The provided answers only clearly support that the light-field approach avoids the moving-focus magnification problem, and that a well-aligned DSLR stack may look similar in practice.