Trunk comparison: Renault Clio vs Skoda Superb Wagon

Key Differences
The Škoda Superb Wagon offers significantly more cargo length: +31.9 in (61%) with the seats folded down and +13.8 in (49%) with the first row upright. The trunk opening of the Škoda is also +3.1 in (11%) higher than the Clio's. The loading edge of the Škoda is considerably higher above the road: +13.8 in (146%).
Conversely, the Renault Clio has a significantly greater depth between the loading edge and trunk floor: +27.2 in (863%) compared to the Superb. The narrowest width of both trunks is the same, and the opening width of the Škoda is only slightly larger (+2.4 in / 6%) and is not highlighted here.
Impact on Usability
Volume and length: Due to the significantly greater cargo length, the Superb Wagon is better suited for long items (furniture, slats, skis) and for transports requiring a lot of depth. For families or regular transport of larger loads, the Superb is the more practical choice.
Loading height and handling: The higher loading edge of the Škoda makes lifting heavy items more strenuous; those who frequently load heavy cargo or do not have a lifting assist will see the Clio (lower loading edge) as an advantage.
The greater depth in the Clio indicates a trunk floor positioned lower relative to the loading edge — this can make securing cargo easier and prevents items from falling out as easily, but often requires a short lift and lower motion when stowing.
Opening height: The higher trunk opening of the Superb (+3.1 in) makes it easier to accommodate taller items compared to the Clio.
Width: Since the narrowest width is the same, both vehicles are equally limiting for very wide loads; the small difference in opening width (Škoda +2.4 in) is practically negligible.
Summary
For maximum payload, longer or taller items, and regular family/transport tasks, the Škoda Superb Wagon is clearly superior. The Renault Clio scores with a lower loading edge and a trunk floor positioned lower, which can make handling frequent, rather smaller or heavier individual items easier in everyday use.
Which advantages are more important depends on the intended use: volume and length (Superb) vs. easier loading at lower heights (Clio).