Kind of like the joke of which will hit the ground first if dropped from the top of a building, 1 ton of feathers, or 1 ton of rocks. The answer of course is that they will hit at the same time.
Well, in a vacuum tube, even a single feather and a huge rock will land at the same time.
In ambient conditions, however, the ton of rocks will hit first as the sheering forces, a function of surface square footage (plus materials), on the falling feathers, will be higher thus giving it more upward buoyancy.