Here is a pic of the new roller kit alongside the old set up;
Here is a link to where I found this kit on ebay;
A lot of technical information as to why this material and set up should outlast stock. NOTE: I'm building my motor for a vintage MX bike that gets ridden about two or three times a year and in reasonably short bursts, unlike a road race motor that turns 10-12,000 rpm for extended periods. If you have a street or dirt type application these wheels might be ok, but for roadrace you would probably want the KA.
I have been getting technical advice from one of the ADV inmates (Mr Fast), we raced with Mr Fast and his son Azcagiva in Mexico, they have a super fast SL350 set up for the desert as well as CB350 road race bikes so they are the authorities on this. I do believe they run the KA setup.