Multiple instances of a particle emitters effect in different sizes?

I have created a rain-like effect with particles emitters. I want to use the same effect but in different sizes/ radius. Do I have to create many duplicates of the object in different sizes or can I just create different instances on the scene with different sizes? When I change the setting “radius” on a particle emitter in the scene ut change the size of all particle emitters that use the same object.