Abrasiveness is not as important as proper fit to the gun. If the gun wiggles around in the holster you will eventually get wear no matter what the holster is made out of.
edit: unless your shooting IDPA / IPSC ect.. you will have minimal wear on your gun. mine tend to live inside their holsters. i have a few that have "minor" wear because i shoot them more than others. but it's a non-issue. i'd prefer function over appearance any day.