Trunk comparison: Ford Focus Wagon vs Kia Sportage

Key Differences
When comparing the trunks, three differences stand out clearly: with the front seats upright, the Ford Focus Wagon's trunk is 5.5 in (16%) longer, the depth of the trunk (loading edge to trunk floor) is 0.8 in (100%) greater in the Ford, and the loading edge of the Kia Sportage is 3.5 in (14%) higher above the ground.
All other stated differences are less than 10% (e.g., length with folded seats Ford +5.9 in / 9%, width at the narrowest point Ford +3.5 in / 9%).
Implications for Usability
The 16% greater loading length with seats upright makes the Ford clearly more practical for long items when the rear seats are in use (e.g., slatted frames, skis, long boxes). Even with partial seat use, more usable cargo space remains.
The greater depth of the Ford (0.8 in, indicated here as a 100% difference) means the interior behind the loading edge lies somewhat "deeper." Practically, this means items can be stored lower down and thus more stably and often less visibly; however, loading may require slightly more bending to reach the floor.
Combined with the longer loading area, this improves storage for stacked or bulky cargo.
The higher loading edge of the Kia (+3.5 in / 14%) increases the lifting and effort required when loading and unloading—especially with heavy items.
For frequent loading of heavy loads or with lower physical fitness, the Ford is therefore more comfortable. The slightly higher trunk opening of the Kia (+0.8 in / 3%) hardly noticeably eases loading tall items.
In summary: The Ford Focus Wagon has an advantage especially when it comes to longer or stacked cargo and easier handling without a high loading edge. The Kia Sportage has a higher loading edge, which means more lifting effort, but offers a slightly higher opening height; the other differences are rather minor.