Maybe it's just me, but the current batch of X Putt'rs seems a little bit more rigid and not as soft as from about a year ago. I have 4 that are very soft, but not floppy, feel kinda like the Soft Banger GT's. three new ones I got so I could practice are as I mentioned above. I am on a quest to find the softer ones. It's not that the new discs are bad, but when you get accustomed to the feel fo a putter, just a slight difference can give you something extra to notice.
I did notice that my first Putt'r is a darker dull yellow where as two of the new ones are a bright yellow. Could the shade of the color really have that much to do with a discs touch and flexibility? I have a white Pro D drone, that is very grippy, where a Pro D Zone in orange feels slick, and a almost pumpkin pro D Buzzz feels between the two.