Keep in mind that there are good brushless motors and poor ones--just like brushed motors. So far the Asian brushless motors are little better than cheap brushed motors. The Eastern European are a bit better--but if you want good motors you generally have to get them from Western European companies or from U.S. companies. The biggest issue seems to be the steel used in the stator is of poor quality leading to low efficiency.

Just because it is brushless does not mean it's better!

Steve