Trunk comparison: Seat Tarraco vs VW Passat Wagon

Main Differences
Among the measured values, two differences stand out clearly: The VW Passat Wagon has a significantly greater depth between the loading edge and the trunk floor: +1.2 in, which corresponds to +50% compared to the SEAT Tarraco.
In contrast, the SEAT Tarraco's loading edge is higher above the ground: +4.3 in, or +17% compared to the Passat.
All other differences (trunk length with seats folded +5.5 in / +7%, length with first row upright +0.4 in / +1%, opening height +1.6 in / +5%, opening width +3.9 in / +10%) are ≤10% and thus less pronounced.
Impact on Usability
The greater depth in the Passat practically means more usable volume below the loading edge: bulky or tall items can sit deeper without protruding over the loading edge. This makes storing bulky loads easier and increases the usable interior height in the area behind the loading edge.
The higher loading edge in the Tarraco is noticeable when loading and unloading: heavy or bulky items must be lifted over an 4.3 in higher edge, making loading more strenuous and less practical. For frequent loading of heavy items, the Passat is preferable due to the lower loading edge.
In summary: For maximum usability when transporting tall or bulky items and for easier handling during loading, the VW Passat Wagon is advantageous (deeper loading area and lower loading edge).
The Tarraco offers no clear advantages in the relevant dimensions exceeding 10%; smaller advantages in opening width or overall length fall below this threshold and are less significant in everyday use.