Trunk comparison: Ford Focus vs VW Golf Wagon

Key Differences
The VW Golf Wagon offers significantly more loading length: +12.6 in (21%) longer with seats folded down and +12.6 in (42%) longer with the first row of seats upright compared to the Ford Focus.
The Ford Focus, on the other hand, scores with a greater trunk depth and a higher loading edge: the depth (loading edge → trunk floor) is +2.8 in (64%) greater and the loading edge is +3.1 in (13%) higher above the ground than in the Golf.
The trunk and opening widths are identical; the height of the trunk opening differs by only +0.8 in (3%) in favor of the Focus and is therefore negligible.
Implications for Usability
For long items (skis, slats, furniture parts), the VW Golf Wagon is the more practical choice: the significantly greater loading length, both with folded seats and with the rear bench upright, allows storing longer cargo without or with less folding of the seats.
The Ford Focus is better suited for taller or bulkier cargo that requires more vertical space because the trunk floor lies further below the loading edge. The additional "volume in depth" helps with stacking or transporting tall boxes.
However, the +3.1 in higher loading edge makes lifting heavy items into the trunk more demanding—especially for a single person or during frequent loading and unloading.
Since width and opening width are the same, there is no advantage or disadvantage for wide items. The small difference in opening height (3%) practically does not affect everyday usability.
In summary: Those who need longer items or more usable loading length choose the Golf Wagon. Those who prefer more usable depth space or vertical volume and frequently carry tall but not too heavy loads can benefit from the Ford Focus—at the cost of higher effort when lifting due to the higher loading edge.