I am speaking from expierience not specs. I own a 455,350,372xp,359,Jonsered 630 and a makita 6401. The 455 is a good reliable saw. It is a bit heavy for its power output,but 2 pumps on the primer bulb pull the choke 3rd pull it fires,push choke in, pull cord and it goes. EVERY TIME!!!!!. It is not a pro saw and does not hold a candle to the 372, makita 6401 or the jonsered 630. It has a moderately tough time running a 24 inch bar but it works. It is much happier w/ a 20 inch bar. Your can actually tell a difference in the x-torque engine at lower rpm. I would say the 455 has more off idle torque than any of my other saws including the 372xp. But in the cut it doesnt compare. It is a very good ,reliable saw, but i dont think it would hold up to everyday commercial use. Nor would the 350 or the 359.