Trunk comparison: Seat Leon vs Durchschnitt Subcompact

Key Differences
The SEAT Leon offers significantly more usable space in several areas compared to the average subcompact: The usable trunk length with the seats folded down is 8.3 in (16%) longer, and when the first row of seats is upright, the advantage is even 7.9 in (32%).
The trunk is also 2.4 in (32%) deeper in depth (measured from the loading edge to the trunk floor), which also indicates more capacity.
There is a split in width: the narrowest point in the trunk is 6.7 in (21%) narrower in the SEAT Leon than average, while the width of the trunk opening is 7.1 in (20%) larger. Smaller differences (under 10%) such as the opening height or loading edge height are negligible.
Implications for Usability
The longer trunk length and greater depth make the SEAT Leon better suited for long or stacked cargo: furniture parts, long construction panels, skis, or multiple suitcases can be accommodated more easily.
Especially when the seats are not folded down (first row upright), the Leon clearly has the advantage, simplifying everyday use with lots of luggage or longer items.
The wider trunk opening makes maneuvering bulky items inside easier because the access is larger.
At the same time, the significantly narrower interior width at the tightest point reduces the width of the actually usable loading area: very wide items, large boxes, or strollers with wide chassis fit better at the narrowest point in the average subcompact than in the Leon, even though they can be more easily positioned given the opening size.
Practically, this means the Leon is better for elongated and stackable cargo, less so for very wide single pieces.
Overall, the picture is as follows: those who frequently transport long items or a lot of stacked cargo benefit from the SEAT Leon.
Those who regularly need to transport very wide single items or wide strollers might have advantages with the average subcompact due to the larger narrowest interior width. Smaller differences like loading edge height or opening height hardly affect everyday usability.