Mass of object and movers/gravity

Does the mass of an object have an impact on how effective movers etc are? I have gravity turned off and I copied a microchip from one object to another (updating a model in a scene) and the new one seems to fall faster. I thought I'd tweaked the mass to produce an equivalent KG rating.

I have gravity turned off, and am simulating gravity with a mover constantly pushing down, and then I have a thrust pusher provding upward force.