The appropriate unit to measure weight is the newton. Now, if it is really the mass you wanted, you could use kilogram or gram.
Since kilograms are the unit we use to measure mass, the answer is no: both have 1kg. of mass. :D
It depends on what you want to measure: length, mass, conductivity, elasticity, tensile strength etc.
Depending on the size of the feather - grams or milligrams.
The international (SI) unit of mass is the kilogram.
I suggest the millinewton. However, please note that people commonly confuse weight and mass; if it is actually the mass you want to measure, then use the gram.
Millinewton can be the best unit for measuring the weight of feather.
The same unit as you use to measure any mass. The SI unit for mass is the kilogram.
The standard unit to measure mass is kilograms.
The SI unit of mass is kilogram (kg).