Chainsaws generally differ by power source, design and teeth. Whether you get a gas-powered or electric chainsaw will depend on how you plan on using it.
Square vs. Round Cutter Teeth
Round cutter teeth are much easier to clean and can be sharpened with a round file. They last longer than square chains, too, and stay sharp for longer. Aside from that, its cutting edge is more durable because it is bigger and has better support compared to square cutter teeth chains.
There are two kinds of square cutter teeth out there: the one with a square grind and the one with a round grind. Generally speaking, the square grind chain can cut up to 15% faster compared to the round grind chain. It also requires less power compared to the round grind chain. While it can be difficult to keep this kind of teeth sharp, you can sharpen it with a round file.
Either way, the square grind chain is considered to be the best kind because of how much quicker it can. In fact, it is known to make the best cuts when sharpened. However, it is known to be the worst at staying sharp and needs a special file to be sharpened.
Bow Blade vs. Bar Blade
Bow blades aren’t very common nowadays, but basically refer to the chainsaws that are shaped like a bow and are primarily used for repetitive bucking. Nowadays, the majority of chainsaws come in a bar blade design of varying lengths. People usually opt for them because they are much more versatile compared to bow blades.