Trunk comparison: Seat Leon vs VW Golf Wagon

Key Differences
The VW Golf Wagon offers significantly more cargo length: with the seats folded down, the trunk is 15 in (26%) longer, and with the first row upright, 10.2 in (31%) longer than the SEAT Leon. In width at the narrowest point, the Golf Wagon also has an advantage: it is 7.9 in (25%) wider there.
The SEAT Leon, on the other hand, stands out with a greater trunk depth from the loading edge to the trunk floor: the depth is 5.5 in (127%) greater, and the loading edge of the SEAT Leon sits 5.5 in (23%) higher above the road than the Golf.
Smaller differences are the trunk opening height (+0.8 in / 3% in favor of the SEAT Leon) and the opening width (+3.5 in / 9% in favor of the SEAT Leon) — these are below the 10% mark and are not highlighted here.
Impact on Usability
Due to the significantly greater cargo length and the larger narrowest interior width, the VW Golf Wagon is more practical for long and wide items (e.g., furniture, long boards, several large suitcases). The larger interior makes storing bulky or elongated loads easier and more flexible.
The SEAT Leon offers a significantly greater trunk depth relative to the loading edge and a higher loading edge above the road. This means: the loading floor lies deeper below the loading edge, which can create more usable vertical interior space, while at the same time requiring a higher lifting angle when loading.
In practice, this means there is space for bulky, rather compact stacked cargo, but loading heavy items is more strenuous because they must be lifted higher above the roadway.
In short: For maximum length, interior width, and easier loading of heavy or long items, the VW Golf Wagon is the more practical choice.
Those who instead need a deeper interior under the loading edge and prefer compact, stackable cargo will find advantages in the SEAT Leon — at the cost of higher loading effort due to the higher loading edge.