In Science, there is a huge different between mass and weight and people often some misconception between them. We can compare mass and weight by their definition, whether they stay constant or not when their location change, measured using what or unit etc, to differentiate them.
Mass:
Is the amount of substance in the body
Is always a constant at any place and time
Is measured in kilograms (kg)
Is measured using a beam balance
Is a scalar quantity
Can never be zero
Is an intrinsic property of a body and is independent of any external factor
Weight:
Is the force of gravity acting on the body
Depends on acceleration due to gravity at the location
Is measured in newtons (N)
Is measured using a spring balance
Is a vector quantity
Can be zero
Depends on mass of the object which is attracting it and force with which it is being attracted(which in turns depends on the distance between the two)