[nick__m]

here ChatGPT awnser to the prompt in quotes:

Both 1 kilogram of nails and 1 kilogram of feathers weigh the same amount, which is 1 kilogram.

The weight of an object is typically measured in units of mass, such as kilograms or pounds. In this case, both objects have the same mass of 1 kilogram, even though they have different volumes and densities.

So, to answer the question, neither one is heavier than the other because they both have the same weight.