Trunk comparison: Kia Stonic vs Skoda Superb Wagon

Summary of the Biggest Differences
The Škoda Superb Wagon offers significantly more loading length: with the seats folded down, the trunk is +29.9 in (55%) longer, and with the first row upright, +14.6 in (54%).
The Kia Stonic, on the other hand, stands out with a significantly greater depth between the loading edge and trunk floor (+3.9 in, +125%) as well as a higher loading edge (+7.1 in, +31%). Smaller differences (widths and height of the opening) are under 10% and thus less relevant for everyday use.
What Impact Do These Differences Have on Usability?
The significantly longer loading area of the Superb Wagon makes it the superior choice for longer or bulky transports: long planks, skis, furniture parts, or many suitcases can be accommodated more easily and on one level.
Those who regularly transport long items or often use fully folded seats benefit from the Superb.
The Kia Stonic, with its greater depth between loading edge and floor and the higher loading edge, changes the handling when loading and unloading: the higher loading edge (+7.1 in) means more effort when lifting heavy loads into the trunk.
The larger "recess" behind the loading edge (depth +3.9 in) allows items to be sunk deeper but reduces the effective pass-through height of the opening — very tall or bulky parts may need to be loaded at an angle.
For easy loading of heavy loads or frequent loading and unloading at street level, the Superb is more practical due to the lower loading edge.
In summary: For long transports, family or travel use with lots of luggage, the Škoda Superb Wagon is the more practical choice. For occasional, more compact use, the Kia Stonic may be sufficient but brings ergonomic disadvantages when lifting heavy items due to the higher loading edge and deeper trunk floor.