A lot less than farming meat which requires all the cost of growing that and ensuring the animals are fed and watered until slaughtering.

From the article

But not all agriculture is equally land-intensive. Meat-heavy diets require far more land than low-meat and vegetarian diets.

But not only that it also requires crop land for plant-based diets. From a different source

If everyone shifted to a plant-based diet we would reduce global land use for agriculture by 75%.

[...]

If we would shift towards a more plant-based diet we don’t only need less agricultural land overall, we also need less cropland.

https://ourworldindata.org/land-use-diets