My Redmax 8500 was delivered yesterday, and though its raining today so I can't really test them out properly, I figured I'd do a photo comparison with the "other" most powerful blower, the Echo PB770. I don't have a Shindaiwa 802 or else I'd include that here too. Of note - the redmax 8500 I bought (from a site sponsor) was missing the fan screen (appears they simply forgot to install it at the factory) so they will be sending me a new unit and i'll send the one in the pictures back. Here's a look at the 8500 (sans screen) And here's a comparison to the Echo 770 The 8500 weighs (by my arm scale and my back scale) basically the exact same as the 770. The difference is negligible - again keeping in mind I haven't worn the 8500 for any length of time yet. The 8500 is quite a bit taller and slightly deeper than the 770. The quality of the plastic parts on the 770 is decidedly superior, and the straps and backrest are significantly more padded and thick. Additionally the 770 has many more cooling slots in the backrest - further testing will reveal if the 8500 can cool the back as well. The tubes on the 8500 are even wider than those on the 770, which has pretty wide tubes to begin with. The tubes on the Echo are made of a thicker, more rigid plastic than those of the Redmax - the Redmax tubes are thinner and very flexible (you can squish them with your hand). The Redmax tubes are lighter in weight than the Echo tubes. Accessing the motor on the RedMax is easier. The Echo has a bigger muffler and a larger exhaust exit area. Accessing the spark plug and the air filter on both units is extremely easy, and both units have almost identical sized dual-stage foam/paper air filter setups - the Echo on the side and the Redmax on the top.