Trunk comparison: Ford Focus vs VW Tiguan Allspace

Key Differences
With the seats folded down, the VW Tiguan Allspace is 13.8 in (23%) longer than the Ford Focus, and with the front row upright, it is also 13.8 in (45%) longer. However, when all seats are upright, the Ford Focus has 11.8 in (64%) more trunk space than the Tiguan.
The trunk opening of the Focus is 3.1 in (11%) higher, and the loading floor (distance from loading edge to trunk floor) of the Focus is 7.1 in (1700%) lower than that of the Tiguan.
The loading edge of the Tiguan sits 3.1 in (12%) higher above the road. The width of the trunk opening is 5.5 in (14%) larger on the Tiguan; the narrowest interior width differs by only 0.4 in (1%) in favor of the Focus.
Implications for Usability
The Tiguan Allspace is better suited for long or wide cargo when seats are folded down or the front row remains upright: the longer loading floor and the wider trunk opening (+5.5 in) make it easier to load furniture, long items, and bulky packages.
The Ford Focus is advantageous in everyday use when all seats are occupied: with 11.8 in more trunk space with upright seats, it offers more room for luggage and shopping when fully occupied.
The higher trunk opening (+3.1 in) facilitates loading tall items, and the significantly deeper loading floor (-7.1 in compared to Tiguan, thus a larger recess) increases usable volume below the loading edge but makes loading somewhat less convenient (deeper placement, bending).
Practically, this means: Those who often drive with varying seat configurations and long, wide loads or prefer a higher, wider opening benefit more from the Tiguan Allspace.
Those who mostly travel fully occupied with regular luggage, prefer easier handling at loading edge level, and use additional space in the deep loading floor are better off with the Ford Focus.