Trunk comparison: Peugeot 308 SW 3-row vs VW Tiguan Allspace

Main Differences
The VW Tiguan Allspace offers significantly more cargo length: with seats folded down, 17.7 in (31%) more and with seats upright, 4.7 in (34%) more than the Peugeot 308 SW 3-row.
In contrast, the Peugeot has a significantly larger trunk opening: the opening height is 6.7 in (24%) greater, and the depth between the loading edge and trunk floor is 1.6 in (indicated as 300% in the data) greater in the Peugeot.
The Tiguan's loading edge, however, sits significantly higher above the road: 8.3 in (38%) higher than the Peugeot. Differences in the width of the loading area or opening are negligible at about 0.4 in (<10%).
Impact on Usability
For transport tasks involving longer items or lots of luggage (folded seats, long slats, bulky goods), the Tiguan Allspace is more practical: the significantly greater cargo length provides more usable loading space and makes it easier to load long parts.
The Peugeot, on the other hand, scores in handling heavy or tall items: the lower loading edge makes lifting and placing suitcases or shopping bags easier, and the higher trunk opening allows loading tall items without conflicts with the roof edge.
The greater "depth" between the loading edge and floor also means the floor is lower – this affects how well flat items can be slid in or secured against rolling out.
In short: Those who primarily need a lot of length and volume choose the Tiguan Allspace. Those who more often load and unload heavy or tall individual pieces comfortably are better served with the Peugeot 308 SW. Width differences are hardly relevant.