Trunk comparison: Tesla Model Y vs VW Golf Wagon (Mk5)

Key Differences
When comparing, two things stand out: The Tesla Model Y offers a significantly longer cargo floor with the rear seats folded down — +9.4 in or +14% compared to the VW Golf 5 — and the Golf has a much greater depth between the loading edge and the trunk floor — according to specifications +2 in (≈+400%).
All other differences are much smaller (e.g. +2.4 in/6% with extended load and front seats upright, +2 in/7% higher trunk opening on the Golf, 5% wider narrow point on the Golf); the width of the trunk opening is identical.
Impact on Usability
The longer cargo floor of the Model Y with folded seats makes it significantly more practical for long or bulky items (furniture parts, long slats, skis): they can be more easily fully accommodated because the usable cargo space extends deeper toward the rear.
The considerably greater depth in the Golf (loading edge → trunk floor) means that the trunk floor in the Golf lies significantly lower below the loading edge.
Practical consequences: on one hand, this increases the usable interior height and volume below the loading edge, which can help when stacking tall items; on the other hand, it creates a more pronounced "step" when loading — heavy or bulky items must first be lifted over the loading edge and then lowered into a deeper recess, making loading individual heavy parts less convenient.
Combined with the slightly lower loading edge height of the Golf (the Model Y's loading edge is about 2.4 in higher above the road), the Golf overall offers easier initial pickup from the ground but requires a greater lowering into the cargo area.
Smaller differences such as the slightly greater narrowest width in the Golf (+2 in/5%) or the slightly higher trunk opening of the Golf (+2 in/7%) are less decisive in practice: they can minimally ease fitting very wide items but do not change the fundamental usability.
In short: For long, flat loads and maximum continuous length, the Model Y is clearly advantageous. For deeper, volumetrically generous loading solutions (more space below the loading edge), the Golf offers benefits but introduces an additional handling step when loading due to the lower floor position.