The pro saws today all have computers controlling fuel delivery.
Not correct. Maybe Stihl with their E-tronic system but not Husky and certainly not Echo, though both can be bought with electronic fuel injection.
The Echo pro saws are all carbureted (Walbro). The differentiation between the Echo home owner and pro saws is, the home owner saws will have a cat in the muffler can whereas the 'pro saws' don't and the pro saws aren't clamshell either. Easy to tell, just look under the muffler can and see how the jug attaches to the 'crankcase' and look in the muffler can, the Cat will be visible behind the exhaust deflector, under the spark arrestor screen, plus the Echo 'pro saws will come with Echo's I-30 easy start system.
I have 3 echo's, a Timber Wolf, a CS top handle arborist saw and an Echo straight shaft brush trimmer.
The CS top handle has to be the absolute best buy in top handle arborist saws today. They are basically 1/2 the price of the Stihl (had one of them and smashed it under the
chipper truck tire). Stock, they are a little down on power until fully broken in (couple tanks of fuel) and all Echo saws are made in Japan with quality Japanese assembly. Finally, a hard to beat warranty as well. 5 years consumer use, 1 year commercial.
I do suggest purchasing an aftermarket can for them. Saw-it-Again carries both the Forrester can as well as the OEM (gutted) can. Not that much jack either and of course remove the EPA mandated limiter caps on any saw.
Down to exactly ONE Stihl now that I use a lot. My ancient 028. the big ones 090 and 075 are shelf queens.