Trunk comparison: Ford Focus vs VW Passat Wagon

Biggest Differences
The VW Passat Wagon offers significantly more cargo length: With the seats folded down, the trunk of the Passat is 18.1 in (≈30%) longer, and with the first row of seats upright, it is even 14.2 in (≈47%) longer than the Ford Focus. The Ford Focus, on the other hand, has a significantly greater trunk depth (loading edge → trunk floor): The depth in the Focus is 3.5 in (100%) greater than in the Passat.
Impact on Usability
The greater cargo length of the Passat clearly makes it superior for transporting long items (e.g., slats, skis, furniture parts)—even when the rear seats are not folded down, significantly more long loads are possible.
For users who regularly transport bulky, elongated goods, the Passat is therefore the more practical choice.
The greater depth in the Focus means that cargo sits deeper in the footwell (3.5 in), which has two effects: it creates more "usable space" below the loading edge for discreet storage and a lower center of gravity for the cargo.
This helps with securely storing smaller, taller items in the trunk. However, this is offset by the fact that the loading edge of the Focus is 2 in (≈8%) higher from the road—making lifting heavier loads somewhat more strenuous than in the Passat.
Other dimensions: The width at the narrowest point is the same; the width of the trunk opening (+2 in, ≈5% in the Passat) and the height of the opening (+0.4 in, ≈1% in the Focus) are comparatively minor and hardly affect practical use.
Practical Recommendation
If you frequently transport long or bulky cargo: prefer the VW Passat Wagon. If you rather need a deeper cargo well where items can lie lower and more stable (with a slightly higher loading edge): consider the Ford Focus.
For everyday usability with normal luggage and shopping use, both models are similarly practical in width.