Ever since the Edison broke into our lives, people keep comparing it to boards from the makers world - like Raspberry Pi and even to Arduino. I think it's a total miscomprehension of what this module is and what is its purpose.
Edison is not primarily targeted at makers. It is targeted at IoT manufacturers with medium-high manufacturing volume, that need some real computation power, which even high end microcontrollers can't offer, along with some serious connectivity.
|Intel® Edison (Source)|
The true competition to the Edison will not come from Pi nor from Arduino - it will come, once again, from ARM with ultra-cheap, connectivity-centric modules such as HE and HLK-RM04. While not providing half as much computation power offered by Edison, they do allow both makers and manufacturers to enable product connectivity easily and on-the-cheap.