Trunk comparison: Nissan Rogue Sport vs Seat Leon

Significant Differences (>10%)
When comparing the cargo compartments, three differences stand out: The Nissan Qashqai offers a longer trunk by +6.3 in (11%) in the folded-down state compared to the Seat Leon. At the narrowest point, the Qashqai's trunk is wider by +9.1 in (28%).
In contrast, the Seat Leon has a significantly greater trunk depth (distance from loading edge to trunk floor) and is +7.5 in (317%) higher here than the Qashqai. All other mentioned differences are below 10% or are equal (e.g., height of the trunk opening).
Impact on Usability
The combination of more length with folded seats and significantly greater width at the narrowest point makes the Qashqai more practical for transporting long and bulky items (e.g., furniture parts, slats, bicycles with the front wheel removed).
The greater width also allows wider boxes or millimeter-precise loads to pass through more easily.
The significantly deeper trunk floor of the Seat Leon means more usable volume below the loading edge — advantageous for deep, bulky, or low-profile items and when you want to "sink" luggage.
At the same time, a deeper recess can make loading and unloading flat, long items more difficult because they first have to be lifted over the loading edge or pushed into a depression.
Smaller differences like the +1.6 in longer loading surface with the rear seat upright in the Qashqai or the +0.8 in higher loading edge of the Qashqai are less decisive in practice: they only marginally affect handling. The same height of the trunk opening means headroom during loading is comparable.
Practical conclusion: If you frequently transport long or wide loads, the Nissan Qashqai is the more suitable choice. If, on the other hand, you need more trunk depth for bulky, lower-lying cargo, the Seat Leon can be more advantageous.