Trunk comparison: VW Golf Wagon vs VW ID.3

Key Differences
The VW Golf Wagon offers significantly more cargo length in the trunk: with the seats folded down, the trunk is 13.4 in (22%) longer, and with the front seats upright, it is even 11.8 in (38%) longer than in the VW ID.3. The depth from the loading edge to the trunk floor is noticeably greater in the ID.3: the ID.3 has +2 in (45%) here.
Additionally, the loading edge of the ID.3 sits noticeably higher above the road: +6.3 in (26%). Differences in the height of the trunk opening (+1.2 in / 4%), the narrowest width (same), and the opening width (+1.6 in / 4%) are minor and less relevant.
Impact on Usability
Practically, this means: The Golf Wagon is better suited for long items and significantly more flexible cargo transport — such as skis, building materials, or multiple suitcases — because the usable loading length is considerably greater both with folded and upright seats.
For users who regularly transport long loads or large volumes along the vehicle’s longitudinal axis, the Golf is clearly advantageous.
The ID.3 offers more space below the loading edge due to the greater trunk depth, which in some situations provides additional storage volume (e.g., flat boxes or luggage that can be stored just below the loading edge).
However, the higher loading edge makes handling heavy or bulky items less comfortable: heavy lifting requires more effort, loading is more strenuous, and sliding items in or out can be easier on ramps or with aids.
For frequent loading of heavy loads or very low floor rails, the Golf is more practical due to the lower loading edge.
Since width and opening dimensions are practically the same or only slightly different, these values hardly affect usability.
In summary: more loading length and lower loading height favor the Golf Wagon for long or heavy cargo; the deeper loading floor of the ID.3 can offer additional storage space for certain luggage shapes but does not pay off in easier handling of heavy loads.