Trunk comparison: BMW X5 vs Skoda Karoq

Key Differences (highlighted >10%)
The BMW X5 offers 11.8 in (19%) more trunk length with the seats folded down than the Škoda Karoq and is also 11 in (37%) longer with the front row upright.
The Škoda Karoq, on the other hand, scores with a 4.7 in (15%) higher trunk opening height and a significantly greater depth between the loading edge and trunk floor: +5.5 in (1400%) compared to the X5. Additionally, the loading edge of the BMW X5 is 4.3 in (16%) higher above the ground than that of the Karoq.
The width differences (narrowest point +3.5 in/9%, opening width +2 in/5% in favor of the X5) are under 10% and thus comparatively minor.
What this means for usability
Due to the significantly greater cargo length in the BMW X5 (both with folded seats and with the front row upright), the X5 is better suited for long or flat items such as slats, long boxes, or skis, as well as for larger overall loads that need to be arranged lengthwise.
For transports where length is crucial, the X5 offers a clear advantage.
The Škoda Karoq is more practical for loading and unloading heavy or tall items: the higher opening height and the significantly greater depth of the trunk create more usable vertical interior space and make it easier to accommodate tall objects.
The lower loading edge of the Karoq (since the X5’s loading edge is higher) makes lifting heavy loads from the ground into the trunk easier and more back-friendly.
In short: Those who need to transport longer or larger cargo lengthwise are better served by the BMW X5. Those who frequently load heavy or tall items and value a lower loading edge and higher opening will find the Škoda Karoq the more practical solution.
The small width differences are usually negligible in everyday use.