Answer:
An older scoria cone would have more weathering and erosion compared to a younger scoria cone. or more soil and plants.
Step-by-step explanation:
While it's true that older scoria cones can accumulate more soil and support more plant growth over time due to weathering and erosion providing a substrate for vegetation, the direct comparison in your original question seemed to be asking for a general characteristic.
So, the answer could depend on the specific context of the comparison. Both more weathering and erosion and more soil and plant growth could be valid responses, depending on the focus of the comparison.