I'm no expert so let me see if I understand this a little better. Are you showing that the Film is more loosely felted or that it is not as well pounced or both.
As far as I know, rabbit/ hare felt doesn't felt as densely with the modern felting techniques as it did with the old techniques involving mercury. Beaver felt generally felts more densely, or perhaps I should say the possibilty is there even with the modern techniques.
The pouncing on the modern Borso's felt is actuall quite good, but the felting itself is a limiting factor in what can be done with it when doing the finish.