Trunk comparison: VW Golf Wagon vs VW Touran

Key Distances and Highlights
The VW Golf Wagon has a trunk that is 29.5 in (221%) longer with all seats upright compared to the VW Touran. Additionally, the trunk depth (loading edge to trunk floor) in the Golf Wagon is 3.9 in (1000%) greater.
What Are the Practical Implications of These Differences?
The significantly longer cargo length of the Golf Wagon with seats upright means: without folding down seats, much longer items or more luggage can be transported.
This makes the Golf Wagon more practical when passengers regularly remain seated and a lot of cargo space is still needed (e.g., long skis, furniture parts, or multiple suitcases).
The greater depth in the Golf Wagon increases usable volume and lowers the center of gravity of the load, which can reduce shifting.
Downsides: heavy items must be lifted somewhat higher over the loading edge or lowered deeper into the vehicle, making loading and unloading potentially more strenuous or less convenient.
Other, Smaller Differences (Under 10%)
The Touran offers a slightly higher trunk opening (+3.1 in, ~10%) as well as about +1.6 in at the narrowest point and in opening width.
These features make it easier to load bulky, wide, or awkward items despite the overall shorter cargo length. The loading edge of the Touran is minimally higher (+0.4 in), which has little practical impact.
Summary
For users who need maximum cargo length and more cavity depth with full seating, the Golf Wagon is clearly advantageous. Those who more often need to load very wide or tall items through a larger opening and width benefit more from the Touran — but at the cost of significantly shorter cargo length with seats upright.