Trunk comparison: BMW 5 Series Touring vs Ford Focus Wagon

Key Differences
The data presents a clear picture: the trunk depth (measurement from loading edge to trunk floor) is significantly greater in the Ford Focus Wagon — Ford leads here by +0.8 in or +100% compared to the BMW. All other differences are much smaller: The BMW offers about +2.4 in (3%) more cargo length with seats folded down and +2 in (5%) more length with the first row upright.
The BMW's loading edge is +1.2 in (5%) higher above the road. The Ford has +2.4 in (6%) more width at the narrowest point and a +0.8 in (2%) larger opening width; the height of the trunk opening is +0.4 in (1%) greater in the Ford.
Impact on Usability
The significantly greater trunk depth in the Ford means practically more "recess" behind the loading edge: goods lie deeper, which increases the usable floor volume for flat or stackable items and at the same time better protects items from view.
This can be advantageous when transporting bulky, flat loads or storing luggage in everyday use. However, a deeper trunk floor can make loading very large or unwieldy items somewhat more cumbersome because they must be lowered below the loading edge.
The higher length values of the BMW (with seats folded and with the first row upright) are small but offer a slight advantage when transporting very long items. The somewhat higher loading edge of the BMW means a slightly greater effort when lifting heavy items compared to the Ford.
The wider dimensions of the Ford (narrowest point and opening) make loading wide or irregularly shaped objects easier — realistically, these advantages are moderate but often noticeable in practice with furniture, bicycles, or wide suitcases.
Conclusion: Apart from the significantly greater trunk depth in the Ford, the differences are small. Those who frequently transport flat stacked goods, luggage, or items hidden under the loading edge benefit from the Ford.
Those who occasionally transport very long items and need a slightly greater cargo length have a slight advantage with the BMW; lifting heavy loads is minimally more comfortable in the Ford due to the lower loading edge.