Trunk comparison: Audi Q5 vs Ford Focus Wagon

Key Differences
The Ford Focus Wagon offers a longer cargo length with the seats folded down (+7.1 in / 11%) compared to the Audi Q5. With the first row of seats upright, the Focus's advantage shrinks to +3.5 in (9%).
The trunk opening of the Audi Q5 is taller (+3.1 in / 11%), while the distance from the loading edge to the trunk floor is +2.4 in (300%) deeper in the Audi than in the Focus.
The loading edge of the Audi also sits higher above the road (+4.3 in / 17%) than that of the Focus. The narrowest point in the trunk is +3.9 in (10%) wider in the Focus, while the width of the opening is +2 in (5%) larger in the Audi.
Impact on Usability
For long items and longer flat cargo, the Focus Wagon has the advantage: the folded seats provide noticeably more length (+7.1 in / 11%), and the greater narrowest width (+3.9 in) makes it easier to accommodate wider parts further back in the cargo area.
The lower loading edge height of the Focus also makes lifting heavy items more ergonomic.
The Audi Q5 scores better in vertical usability: the higher trunk opening (+3.1 in / 11%) allows for loading taller items while standing, and the greater depth between the loading edge and trunk floor (+2.4 in / 300%) creates additional cargo space below the loading edge (good for stacked or lower-lying cargo).
However, the higher loading edge (+4.3 in / 17%) requires more effort when lifting heavy loads into the trunk.
Conclusion: Those who frequently transport long or wide cargo and prefer easy loading are better served by the Ford Focus Wagon.
Those needing more vertical capacity, a higher opening height, and a deeper cargo area (for purchasing/transporting taller items) will benefit more from the Audi Q5 — at the cost of a higher loading edge and somewhat less ergonomic lifting of heavy loads.