Trunk comparison: Fiat Panda vs VW Caddy Wagon

Key Differences
In terms of space, the VW Caddy Wagon shows clear advantages when the rear seat is upright: the trunk is 20.9 in longer (≈98%) than the Fiat Panda.
The opening is also more favorably designed: the Caddy's trunk opening is 10.2 in higher (≈30%), the narrowest width inside is 4.7 in (≈12%) larger, and the width of the trunk opening is 5.1 in (≈13%) wider than the Panda. These values are each over 10% and thus significant.
The Fiat Panda differs in the depth of the loading area and the loading edge: the depth (distance from loading edge to trunk floor) is 6.3 in (≈800%) greater in the Panda, and the loading edge of the Panda is 4.7 in (≈21%) higher above the road.
Impact on Usability
Space and shape: The Caddy is clearly better suited for bulky or wide cargo, especially when the rear seats are to be used.
Due to the larger interior and opening width as well as the significantly longer loading surface with the seat row upright, furniture pieces, wide boxes, or long items can be more easily accommodated and loaded or unloaded.
Opening height vs. loading depth: The higher trunk opening of the Caddy makes it easier to load tall items and handle cargo inside.
The Panda, on the other hand, offers a significantly deeper loading floor (deeper cargo area), which can create more "vertical space" below the loading edge — practical when items need to be partially recessed or lie somewhat lower.
However, this advantage is offset by the Panda's higher loading edge: lifting heavy items requires more effort in the Panda because the loading edge is higher above the road.
Practical conclusion: For regular transport of bulky, wide, or tall cargo, the VW Caddy Wagon is the more practical choice (better length with seats in use, larger opening and width, lower loading edge).
The Fiat Panda can offer volume advantages for certain loading requirements due to the deeper loading floor but is less handy for heavy or wide items because of the higher loading edge and narrower opening. The smaller length difference with fully folded seats (~5%) is negligible for most uses.