My experience with both putters.
I own the ghost spider lvl 92 and recently bought the versa lvl 97.
On the paper the versa is a better putter with same meter speed as the ghost -- not true.
I used to ding my ghost 99% of the time, and since I am an aim and ding sort of putter dinging is important to my game on the greens.
Well, the versa has proven somewhat difficult to ding and my average of hitting the mark has decreased to a very minimum and my one putt stat has suffered -- as has my average, a little.
So, if you can tame the erratic speed of this putter's meter, then you're in the money (maybe), however my advice would be not to risk all that money if you are happy with your current putter.
I feel ripped-off, and an idiot for having fallen for another trick from the developers at wgt.
My 5c...
And now off I go to get my ghost back in the bag...