My assessment of the S-03's was based on a friend's experience who had them. He was disenchanted with them, as I am with the RE040's. The ratings do seem to tell a different story and I will give the S-03's a second look. I'm still puzzled why they would be the least priced of the 3???
Since I plan to garage my Z in successive winters, traction in snow would not be an issue, although we do have an extended "mud season"- not that I would be on back roads except out of necessity.
Thanks for bringing all the specs to light!