Trunk comparison: Opel Astra Wagon vs Opel Corsa

Key Differences
The Opel Astra Sports Tourer offers significantly more cargo space in length and opening: the folded seats create a trunk that is +18.1 in (≈35%) longer, and with the first row of seats upright, the trunk is even +14.2 in (≈55%) longer than in the Opel Corsa.
The trunk opening of the Astra is +4.7 in (≈16%) higher than the Corsa's, and the width of the opening is +8.3 in (≈24%) larger.
In contrast, the Corsa has a trunk depth (loading edge to trunk floor) that is +1.6 in (≈29%) greater and a loading edge height above the road that is +3.5 in (≈15%) higher than the Astra's. The narrowest trunk width differs by only +2.4 in (≈6%) in favor of the Astra and is therefore not a significant difference.
What are the usability implications?
The greater interior length and the significantly larger opening height and width of the Astra make it more practical for long, bulky, or tall items (e.g., furniture parts, skis, long boxes, strollers).
The higher usable length measurement with the rear seats upright also means more cargo capacity when carrying passengers. The larger opening facilitates loading and unloading wide items.
The Corsa has two relevant characteristics: the greater depth from the loading edge to the trunk floor and the higher loading edge above the road. The deeper loading area can help store items somewhat lower and thus less visible or better positioned in the trunk.
The higher loading edge, however, makes lifting heavy items into the trunk more difficult and can make loading more cumbersome, especially with bulky or heavy loads.
In summary: For transport tasks involving long, tall, or wide items, the Astra is clearly better suited.
The Corsa is sufficient for smaller, more compact loads in everyday use and offers a slight advantage in securely storing smaller items due to the somewhat deeper loading area, but with a higher loading height above the road, which makes lifting more difficult.