Trunk comparison: Opel Astra Wagon vs Toyota Corolla Wagon

Key Differences
Both models have the same trunk length with the first row of seats upright; when folding the seats down, the Toyota is 3.1 in (4%) longer.
More noticeable, however, are two significant advantages of the Opel: the trunk opening of the Opel is 3.9 in (13%) higher than that of the Toyota, and the depth of the trunk (loading edge to trunk floor) is 2.4 in (75%) greater in the Opel.
Smaller differences: the loading edge of the Toyota sits 1.2 in (5%) higher above the ground, the narrowest trunk width is 2.8 in (7%) larger in the Opel, and the opening width is 1.6 in (4%) wider in the Opel.
Impact on Usability
The higher trunk opening in the Opel makes loading tall or bulky items (e.g., boxes, plants, furniture parts) easier and reduces the risk of damage when maneuvering through the opening.
The significantly greater "depth" between the loading edge and trunk floor in the Opel creates more usable volume directly behind the opening, improving the accommodation of low-lying or elongated cargo and making stacking more stable.
Despite the slightly greater folded length in the Toyota (3.1 in), this does not automatically mean that long and tall items are better transported there — for tall or bulky loads, the Opel offers overall more practical conditions due to opening height and depth.
The higher loading edge of the Toyota (1.2 in) makes lifting heavy loads somewhat more strenuous, while the slightly larger minimum width and opening width of the Opel (+2.8 in and +1.6 in respectively) moderately ease fitting wider items.
For everyday use with suitcases, shopping, or bulky but not extremely long parts, the Opel is overall more convenient; for occasional very long loads, the Toyota may offer an advantage due to the slightly greater extended length with the rear seats folded down.