Trunk comparison: Hyundai IONIQ vs Peugeot 208

Key Differences
The Hyundai IONIQ offers significantly more cargo length: with the seats folded down, the trunk is 12.6 in (24%) longer than in the Peugeot 208, and with the front row upright, even 9.4 in (36%) longer.
The Peugeot, on the other hand, scores with vertical usability: the trunk opening is 3.5 in (14%) higher than the IONIQ's, and the depth of the trunk (from loading edge to floor) is with 2.4 in (50%) more noticeably larger.
Smaller differences — such as a 1.2 in higher loading edge on the IONIQ or a slightly wider trunk opening on the IONIQ (+3.1 in / 9%) and a minimally greater interior width at the narrowest point (+1.6 in / 4%) — are below the 10% threshold and less significant.
Impact on Usability
For long or flat loads (e.g., skis, long packages, boards, or folded strollers), the Hyundai IONIQ clearly has the advantage due to its greater cargo length: it allows longer items without or with less folding of the seats.
The Peugeot 208, by contrast, is better suited for tall or bulky items that require vertical space: the higher opening makes it easier to lift large boxes or furniture parts, and the deeper trunk recess offers more storage space below the loading edge (better storage of bulky/tall items and neater stacking).
In practice, this means: those who frequently transport long items or need maximum loading length benefit more from the IONIQ.
Those who more often load and unload bulky, tall cargo or value a bit more interior height and loading volume below the loading edge will find the 208 the more practical solution. Smaller differences in loading edge height and width are usually negligible in everyday use.