From a dealer perspective, it's saws for which parts are IN STOCK. Gotta be able to finish jobs on one visit to the workbench. Can't be efficient of you are constantly boxing up half done saws to order parts. Why I hate taking in stuff other than Husky/Jonsered.
But ease to work on for me usually means how many steps are needed to get to the part I need to replace. 200 series Huskys almost always win on that score. Example: even the 372, which I love and is fairly easy, has both advantages and disadvantages vs a 272. Things like changing a throttle cable and maybe even replacing the fuel line require pulling the top handle and dropping the tank on a 372. Not the case on the 272.