Justsaws
Addicted to ArboristSite
Simple. A pro saw is a saw that is marketed primarily to professional users. Has nothing to do with the saw itself.
You sir, have been on fire lately.
Any manufacturer can call any saw they want to a "Pro" saw but a responsible manufacturer will limit its designation to one that will hold up in the hands of commercial users or at least have a fighting chance that a high percentage of the "Pro" rated saws lasting the length of the warranty offered on those saws. Another reason that some saws are listed or sold as "Professional saws" is to help limit a manufacturers liability to the general untrained, unqualified and often negligent public.
As much as the people on this site want to believe that modular engines are not "Pro" engines that is not the case and has never been the case. In terms of the future of the chainsaw it will most likely be dominated by modular engine models in the near future as they are cost effective to manufacture, maintain and limit design bypasses easier.