Chainsaw Repair

Curious. Son runs Stihl 192 and 193. He got one (193?) with OILOMATIC® STIHL PICCO™ Micro™ Mini 3 (PMM3). These are his air (bucket) saws. He really likes the performance the micro mini chain, consequently is switching  to Oregon 90PX 3/8 Low Profile .043 gauge narrow kerf AdvanceCut saw chain for all his air saws. What are the benefits of the Cannon bars and other such bars that you speak of from time to time over the Stihl bars?