I'm looking at purchasing either an echo power head or a stihl Both are similar in price for power heads and attachment. Stihl is about 30$ more expensive for the setup I want. One dealer who sells both Echo and Stihl says the echo PAS 225 has more torque then the Stihl KM55. Any truth to this? I've gone on Echo's website and have found nothing about torque. Echo 225 is a 21cc motor and Stihl KM55 is a 27cc motor. Also opinions on Echo and Stihl and which one you would buy. Echo also has a high torque head, will this make up the difference in torque? The attachments I'll be buying is a trimmer head and an edger.