A "Work Saw" you would hand to your ham headed brother in law and know it would work reliably for him all day if he uses the fuel you provide.
A "Nice Work Saw" is just as reliable but you would only loan it to a buddy that knows how to run and treat nice equipment, can easily be a ported model built for work.
A "Fun Saw" is the gateway drug to the real dangers - it's the first time you told a builder to "turn it up, make it spicy, please" the first stone on the path to obsession, probably is still a decent work saw but a larger model that brings an involuntary grin to your silly face when you squeeze the trigger even if there is no wood to cut. Compression high enough it might bite you when starting it if you forget that it is a fun saw.
A "GTG saw" is built out of envy at having all of your saws be just a little slower than the fastest of each model at the GTGs. By this point you are reading more chainsaw forums than a thirteen year old boy watches porn, and your wife might be checking into having you committed. The GTG saw probably has some clearly non-stock parts, beyond a muffler mod and timing advance and even beyond port shaping and polishing and setting the squish and running a power tool around inside. A GTG saw may also have a piston from some other model, a coil or carb from other sources and non standard sprockets and chain, heck it might have the wrong cylinder entirely.
A " No Playin' Around GTG Saw" - at this point a mofo has decided to throw all sanity to the wind and embark on the quest for truly fast. A tenth of a second is eternity and saving it is like saving starving babies from certain death. In addition to all of the "normal" modifications A NPAGTGS is gonna have a hand filed chain, oversize sprocket, possibly custom bar, two piece head, hand made pipe in some combination of ridiculous excess. At this point there is no turning back. Bark and Knots are the enemy. All else is forgotten for that few seconds at the cant. This is saw is half-assed reliable, grumpy, stubborn and temperamental. You wouldn't let most guys look at it let alone run it and you make of point of telling guys how much more valuable your chain is than their offspring.
A "Hot Saw" is but a mere step from the pinnacle. It may include any of the following in any combination in addition to all of the above features - energy compounded starter, ,jetted oiler passages, forced cylinder cooling, passage clearance piston, racing piston pin, titanium circlips, nitrous oxide injection, variac ignition coil, manually assembled race chain with features so dang secret I cant even post the ideas here, round row bearing dawg, skeletonized covers and flywheel, low out-gassing tuned racing plugs. It cost more money than a man would ever admit to and is spoken of only in hushed whispers. It is ever so slightly faster than every other saw that you have ever run or run against, You may spend several days indexing the spark plug for peak performance. This build is never "done".
A "Race Saw" is intended to make money and make other saws it's *b-word. Nearly everything is hand built and mostly unrecognizable as a chainsaw until you install the harvester bar and unobtainium chain. You smile when you think of it and grimace when you think of all the saws you bought on the path that eventually led you here.......where few men dare to tread.
