There is another performance that might come under penetration, or at least add to a modeler's judgement of a model's penetration. Maybe it's what you're after.

Some models fly with less reaction to gusts. We've all seen models that're jostled about by the wind. And seen others that seem oblivious or at least are better than the bouncy birds. Wing loading is one reason. Drop a feather and a bowling ball, and you get to see a difference in penetration for sure. Moreover, it there are thermals and the wind is gusting, you'll see intermittent differences in the penetration. Unless of course, they drop in a vacuum. (Have they vacuumed around that tower since it was built? )