ClarityCap PUR/PUR-S series

Hi guys, I would like to know if anyone here tried the ClarityCap PUR version capacitors? How would you rate the PUR against the Jantzen Silver Z-Cap or Jantzen SuperiorZ-Cap?

Also there is a PUR-S version, is there any noticeable difference from the PUR version? Could not find any review information on these PUR version from the net, so any input is appreciated, thanks.