Trunk comparison: Dacia Duster vs VW ID.4

Key Differences
The most noticeable difference is the depth of the trunk: the VW ID.4 has a trunk depth that is 25% greater (+0.8 in measured from the loading edge to the trunk floor) than the Dacia Duster.
All other dimensions differ only slightly: with the seats folded down, the ID.4 is only +2 in (3%) longer, while with the first row upright, the Duster is +1.2 in (3%) longer.
The width of the trunk opening is +3.5 in (9%) larger on the ID.4 (just under the 10% mark), and the narrowest width inside the trunk is +0.4 in (1%) greater on the ID.4. The loading edge of the Duster is +0.8 in (3%) higher above the ground, and the opening height of the Duster is +0.4 in (1%) higher.
Impact on Usability
The significantly greater trunk depth of the ID.4 practically means more usable volume vertically: taller items or more stacked suitcases fit better under the parcel shelf, and when loading luggage or moving boxes, the ID.4 has an advantage.
Because the depth measured from the loading edge to the floor is greater, cargo sits lower in the trunk, which increases stability during transport, although bending down to remove items may be slightly more pronounced.
The slightly lower loading edge height of the ID.4 (since the Duster sits 0.8 in higher) makes lifting heavy items into the vehicle somewhat easier than with the Duster. The wider opening width of the ID.4 (+3.5 in) noticeably facilitates loading wider items, even though the difference remains just under 10%.
The other length and height differences are so small (1–3%) that they are hardly noticeable in everyday use: the Duster is minimally longer with the rear seats upright, the ID.4 minimally longer with the seats folded down.
In short: Those who frequently transport bulky or taller cargo clearly benefit from the ID.4 (deeper loading floor and wider opening).
Those who occasionally transport long, flat items with the seats upright have a slight advantage with the Duster, while the physics of loading and unloading (loading edge) slightly favor the ID.4.