here's another one
I have to say, after all my testing with the 500i and comparisons against the 462, with 24" bar, same chain, 7 to 8 pin, fully buried, timed by video fps.... The 500i never was the faster saw. Maybe it has bit more low end torque (and fits better with bars above 28") but not "speed". So it depends on the purpose.
In my personal opinion, all in all, the 462 is the better all around saw. Way better filter, even lighter, almost same cutting performance (especially here in europe, 24" counts as long bar here) and my biggest point if you have to pay the fuel prices as a professional in germany, we have to use pricy alcylate gasoline by law for commercial work, the 500i is not your friend. It sucks more fuel per working hour than a 661!
For example, a half year ago i ported a 500i for a friend and professinal logger, he used the 500i as his all day worksaw because of the low weight (almost as light as a 562xp), he thought it would be the perfect "one saw plan" but the saw is so thirsty, the fuel consumption in comparison to his former 562xp was sky rocketing! 2.5 gallons were no rarity for a normal day in the woods!
Sure, the 500i is not a bad saw and maybe the future, but it comes with some deficits. The technology behind it works flawless, the 500i of my friend has over 400h on the clock (m tronic says). The injection gives you incredible throttle response and acceleration and helps with low end torque but it lacks some fuel efficiency (but im sure later version will change that someday).
here are some charts with detailed consumption stats in liter, measured by the german kwf institute
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As you can see, at max torque the 500i sucks more fuel than a 661 and a whooping liter (or 0.26 gallon) more fuel than the 572xp! The low fuel consumption of the 572 seems like miracle here.
So, the 500i is a powerful light weight saw, the injection works flawless but it is also tremendously hyped at the moment, that just overshadows some flaws in my opinion.