Choose the edition that fits your build rather than assuming the newest version is always the best.
Both Classic and NG now use the same colourful MuPiBox logo. The logo alone does not identify the edition. Check the web administration: CLASSIC identifies Classic; NG or MuPiBox NG identifies the Next Generation. Version numbers change with updates.
The established generation with its own documentation, community experience and familiar installation workflow. A sensible choice when you want an existing Classic setup or already rely on Classic-specific features.
The new generation focuses on a redesigned touchscreen experience, a modern web admin, multiple media providers, child-friendly apps, optional hardware integration and active development. It is still an alpha.
Do not assume that an existing Classic installation can safely be upgraded in place. Back up your media and configuration, check the migration notes, and prefer a clean NG installation when changing generations.