Restriction comes from size of opening. So at some times the answer would be yes. At lower velocities the smaller, softer pedal opens. As RPMs increase so does V, then the whole reed opens. Power per dollar V3 would be the last piece of the puzzle (IMO). For 98.98% of us duel stage, especially with a ported cage, fits the build and wallet best.
Here is a pic of a ported cage :
TB Customz Banshee Rebuild Page
Just have to be careful of the sealing surface. I can't tell from this pic, but at the tip there is a two angled surface that I blended into one, theroy being that any edge causes the air to "tumble". I didn't go quite as close to the screw hole but that surface is tapered towards the port. Also, I didn't waste my time removing the gold anodizing from everything. I:I