Thanks for the kind words. I went back to examine the results more carefully and attempt to draw conclusions more than the eye test. Yes, at longer distances the results will be even more pronounced, but I think that around 20 feet is probably the sweet spot for testing.
I simply copied earlier tests, but after thinking about it, I like the distance used. First off, getting any longer is difficult because the camera angle has to stay the same. In my first tests, I was a foot closer and had to start over because the of this issue on a couple of putts.
Also, 20 feet is about the maximum for a putt I would "expect" to make. That is, I don't expect to make all of my 20 footers, but it's about the longest distance I feel I can make with a solid read and putting stroke. Any longer than that and I have to guess a bit on line. At 60 feet, the Ghost Spider is probably still within a few feet of the hole for the second putt. That said, with the increased speed and break on champ greens, it could create results a bit more extreme. This is where the added forgiveness of the Versa would be beneficial as well.
The speed of the ball and whether you miss high or low of center can affect the makeability of a putt which is slightly off-line, but I would say that the outside edge of the ball being no wider than the outside edge of the hole is a reasonable approximation for a putt that will fall.
I counted pixels and the like to calculate distances and calculate the left-to-right spread. As I mentioned, distance can matter on putts that break considerably, but let's ignore that issue. At 23 feet (the approximate length of these putts), the Ghost Spider had a spread of about 12.4 inches while the Versa had a spread of about 6.9 inches...a big difference. This would mean that the spread of the Ghost Spider should be within the 4.25 inches of the hole at about 7.9 feet. Anything longer than that and a perfectly read and struck putt could occasionally miss. This distance increases to 14.1 with the Versa...nearly twice as much.
These are the extremes and don't suggest that longer than this and a perfectly read and struck putt will miss. It simply says that every once in a while you could have a putt miss at these distances. These 20-putt tests don't show the entire range of possibilities, but I think it's good enough for government work.
Sorry for the lengthy explanation. I'm left with two thoughts. First, I agree with Phred that feel is a big issue. When putting with the Versa, the ball just feels like it rolls more smoothly. I doubt it's actually happening, but it appeared that way to me multiple times.
Secondly, Jim's comments gave me some ideas for other possible tests. For my calculations, I assumed that the putts spread out linearly...that is at half the distance you'd have half the spread and at twice the distance, you'd have twice the spread. What about using 50% of a 30-foot meter instead of 100% of a 15-foot meter? Would that create a greater (or possibly smaller) spread? Also, what about longer putts or putts with breaks? Would the spread actually be linear by distance? Would a 20-foot putt with break mean a much larger spread? Maybe I'll get to these questions...someday :)