Trunk comparison: Audi A6 Avant vs Skoda Superb Wagon

Key Differences and Their Impact on Usability
The Škoda Superb Wagon offers a noticeably larger trunk opening and more space directly behind the loading edge, which makes handling large and tall items easier.
Specifically, the height of the Superb's trunk opening is +3.5 in (≈12%) greater than that of the Audi A6 Avant, and the depth between the loading edge and trunk floor is +2.4 in (≈300%) higher in the Superb.
In practice, this means more vertical loading space and easier loading of bulky, tall items (e.g., furniture parts, large boxes) without heavy lifting or tilting.
Other differences (under 10% or ≤10%) also affect everyday usability but are smaller: The Audi A6 Avant has a usable trunk length that is +4.3 in (≈10%) longer with the first row of seats upright, which is advantageous when transporting long items with seats up.
When folded down, the Superb's rear seats offer slightly more length (+6.7 in / ≈9%), but this advantage is just below the 10% threshold.
The Audi's loading edge sits about +2 in (≈8%) higher above the road, making lifting heavy loads somewhat less convenient, and the width differences at the narrowest point (+0.4 in) and at the opening (+0.8 in) are negligible.
In summary: For frequent loading of tall or bulky items, the Škoda Superb is more practical (higher opening, more space behind the loading edge).
For longer items with seats upright, the Audi A6 Avant offers slightly more loading length. Smaller differences in loading edge height and width have minimal impact in daily use.