What would be interesting is if there was a proficiency test and they could compare the results from the vertical bow users to the horizontal bow users....
And I don't just mean those who pass but also those who fail...
To draw a comparison to harvest success stats between those two types of bows, i think it would be safe to say that those who fail or however many shots land outside killzones depending on how the testing is set up... would qualify as another animal harvested...just not recovered due to improper placement etc.
I bet the 1-3 percent differences you see between those two bow options would tighten up significantly if 'shots fired' outside the kill zones were accounted for in these stats.
It's a bow.