Trunk comparison: Audi Q7 vs Skoda Octavia Wagon

Key Differences
Three differences stand out clearly in the measured dimensions: the trunk depth (loading edge → trunk floor) is 3.9 in greater in the Škoda Octavia Wagon (+900%), the loading edge of the Audi Q7 is 5.5 in higher above the ground (+22%), and the width of the Audi Q7's trunk opening is 7.1 in wider (+17%).
All other deviations (length differences with seats folded or upright, opening height, width at the narrowest point) are below the 10% mark and comparatively minor.
Impact on Usability
The significantly greater trunk depth of the Octavia (3.9 in more) means more usable volume directly behind the loading edge: flat, long, or stackable items can be stored deeper and more securely, and delicate cargo needs to be lifted over the loading edge or secured against shifting less often.
The additionally lower loading edge of the Octavia (compared to the significantly higher Q7 load floor) reduces the effort required to lift heavy items and makes repeated loading and unloading easier (groceries, boxes, strollers).
In contrast, the Audi Q7 offers advantages when loading or passing through wide objects (furniture parts, wide boxes, bulky sports equipment) thanks to the wider trunk opening (+7.1 in) and generally somewhat larger widths at narrow points.
For long items, the Q7 has a slight length advantage with folded seats, but this is under 10% and moderate in practice.
In practical summary: Those who frequently lift heavy or many flat/stacked loads and want easy access (daily shopping, moving boxes, strollers) benefit more from the Octavia due to its deeper loading floor and lower loading edge.
Those who transport wide, bulky items and value a large opening (wide boxes, bulky sports gear) have the better solution with the Audi Q7—albeit with the disadvantage of a higher load floor that makes lifting more difficult.