Trunk comparison: Seat Ibiza vs Skoda Superb Wagon

Key Differences
The biggest difference lies in the loading length: The Škoda Superb Wagon offers +28.3 in (≈+51%) more cargo space with the seats folded down and +15 in (≈+56%) more depth with the first row of seats upright than the SEAT Ibiza.
The width of the trunk opening is +7.1 in (≈+20%) larger on the Superb; however, the narrowest interior width differs only slightly (+2%, not relevant).
The height of the trunk opening is the same on both models. Conversely, the SEAT Ibiza has a significantly greater trunk depth measured from the loading edge to the trunk floor (+4.3 in, ≈+138%) and a higher loading edge relative to the road (+3.9 in, ≈+17%) compared to the Superb.
Implications for Usability
For long or bulky items (skis, slats, furniture parts), the Škoda Superb Wagon clearly has the advantage: the significantly longer loading length and wider opening make it easier to load longer and wider objects and allow more flexible loading combinations (e.g., one-piece boards, bicycles without front wheels, bulky boxes).
This makes the Superb more practical for moving, tradespeople’s needs, or families with a lot of luggage.
The SEAT Ibiza scores more on specific ergonomic and volume aspects: the greater depth between the loading edge and trunk floor means the cargo area lies relatively “deeper” below the loading edge — this can provide more vertical volume immediately behind the loading edge and facilitate storing tall, narrow items.
At the same time, the loading edge is higher, which makes lifting heavy items over the threshold more difficult; this is disadvantageous for regular loading of heavy loads. Overall, the Ibiza is less suitable for long or bulky cargo due to its significantly shorter loading length and narrower opening.
Conclusion: Those who regularly transport long, wide, or bulky items or need a lot of luggage are better served by the Škoda Superb Wagon.
Those who mainly transport smaller, taller, or more frequently stacked items and value a somewhat deeper cargo area behind the loading edge will find a niche argument in the SEAT Ibiza — ergonomically, however, the Superb is usually more advantageous due to the lower loading edge.