Supposedly, the Zone rating is some measure of percentage of balls to their area that they got to (I can't figure our exactly how its calculated.

Hunter .898
Finley .884

Just looking at the raw numbers, how many balls per 9 innings did each catch?

Hunter 2.65
Finley 2.45

Range factor supposedly reflects those kinds of stats, their ability to cover ground and get more balls.

Hunter 1
Finley 9

Either there is something wrong with the rating, or we are drastically misunderstanding something.