Well, assuming no 'buoyancy' effect, we have:

Vt=√(2.m.g/(ρ.A.C))

Where Vt is terminal velocity, m = mass, g = gravity (9.81 ish), ρ = density of air, A is area of object, C is coefficient of drag

Obviously the important factors for our 2 skydivers will be mass and coefficient of drag (given all other factors should be roughly equal).

The question is, therefore, does the increased mass 'overpower' the loss of streamlining and subsequent increase in C? Simple answer is I don't know [

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