Trunk comparison: BMW 5 Series Touring vs Jeep Compass

Key Differences in the Trunk
The BMW 5 Series Touring offers significantly more cargo length: with the seats folded down, its trunk is 9.8 in (15%) longer than the Jeep Compass, and with the first row upright, the difference is even +10.6 in (33%) in favor of the BMW.
In contrast, the Jeep Compass has more pronounced vertical dimensions: the height of the trunk opening is 5.9 in (21%) higher than the BMW, the measured depth from the loading edge to the trunk floor is 6.3 in (1500%) greater, and the loading edge is 4.3 in (17%) higher above the ground.
Smaller differences such as the narrowest trunk width (BMW +3.9 in / 10%) and the width of the opening (+1.2 in / 3%) exist but do not fall into the category of particularly large deviations.
Impact on Usability
The longer dimensions of the BMW make it more practical for long or flat items (e.g., furniture parts, boards, skis): both with folded seats and with the rear bench occupied, more usable cargo length remains.
The greater narrow interior width and the slightly wider opening support loading wider items better than the Jeep.
The higher trunk access and significantly greater vertical depth in the Jeep change handling: the higher opening makes loading tall items easier, but the greater depth (larger "trunk floor distance to loading edge") and the higher loading edge above the ground make lifting heavy loads more demanding because more lifting effort is required and goods must be loaded deep into a recess.
For frequent loading and unloading of heavy or bulky loads, the Jeep is thus less ergonomic than the BMW; however, for high cargo volume with larger vertical clearances (e.g., stacked boxes), the Compass can benefit from its depth.
In summary: Those transporting longer or flat-lying cargo and preferring easy handling have advantages with the BMW 5 Series Touring. Those who more often load tall or bulky freight and can live with a higher loading edge benefit from the larger opening and depth of the Jeep Compass.