Trunk comparison: BMW X4 vs Mazda Mazda CX-60

Key Differences (highlighting only for >10%)

Notably, the trunk depth of the BMW X4 is significantly larger: The depth (loading edge to trunk floor) is +3.1 in (allegedly +700%) greater in the BMW than in the Mazda CX‑60. All other differences are below the 10% threshold: BMW has +1.6 in longer trunk with the first row upright, Mazda has +0.4 in more length with seats folded down, the trunk opening height of the Mazda is +2.4 in (9%) higher, the loading edge of the BMW is +2 in (7%) higher, the narrowest trunk width is +1.6 in larger in the Mazda, and the opening width is +2.4 in larger in the Mazda.

What this means for usability

The greater depth of the BMW (the only percentage-relevant deviation) practically means more usable vertical volume: taller or stacked items can be accommodated more easily in the BMW, and with the same exterior length, more fits in the trunk overall.

However, this is offset by a higher loading edge (BMW +2 in), which makes lifting heavy items harder and loading with low cargo weight more strenuous.

The Mazda scores in width and opening: the larger opening width (+2.4 in) and the larger narrowest width (+1.6 in) make loading wide items and maneuvering bulky cargo easier. The slightly higher opening height (+2.4 in) helps with loading taller items.

The minimally longer loading floor with folded seats (+0.4 in) is practically negligible; BMW's +1.6 in with the first row upright can offer an advantage for long, flat items.

In short: BMW offers more vertical depth and thus potentially more cargo space but pays for it with a higher loading edge. Mazda is less convenient for very tall loads but wins in wide, easy loading and handling bulky, wide items.