Trunk comparison: Peugeot 3008 vs VW ID.4

Key Differences (Summary)
The measured differences are overall small.
None of the values exceed 10% — the largest relative difference is exactly 10%: the trunk depth (loading edge to floor) is 0.4 in or 10% greater in the Peugeot 3008. Other relevant deviations: with the seats folded down, the trunk of the ID.4 is +0.8 in (+1%) longer, with the front seats upright the trunk of the Peugeot is +2 in (+5%) longer.
The trunk opening of the ID.4 is +0.8 in (+3%) higher and +2 in (+5%) wider in opening width. The loading edge of the Peugeot is +2.4 in (+8%) higher above the road. At the narrowest point, both are equally wide.
Impact on Usability
Since no difference exceeds 10%, the practical differences are small but noticeable in certain situations: For very long loads with folded seats, the ID.4 has a slight advantage (+0.8 in), for longer items with normal seat positions the Peugeot is better (+2 in).
The somewhat higher trunk opening and larger opening width of the ID.4 make loading tall or wide items easier; especially bulky parts can be maneuvered more easily through the opening in the ID.4.
The greater depth of the Peugeot (0.4 in / 10%) offers minimally more usable loading surface from floor to loading edge, which helps when stacking or placing flat luggage.
In contrast, the higher loading edge of the Peugeot (+2.4 in / 8%) makes lifting heavy loads into the trunk somewhat more strenuous than in the ID.4.
Conclusion: For everyday usability and frequent loading of wide or tall items, the ID.4 is slightly more practical.
Those who prefer a bit more usable length and a slightly deeper loading surface in the normal trunk (seats upright) have a small advantage with the Peugeot 3008. Overall, however, the differences are minor and rarely decisive alone when choosing the model.