Originally Posted by
chrisreedrules
The E2 is cheaper than the C-Series and it is more economical on shorter flights. Longer than 800-1,000NM is where the C-Series shines.
https://youtu.be/r5uV24hJm-A
They are optimized for different ranges. If you want an aircraft to fly 2800 miles nonstop it will be the C-series. But if all your flights are 2000 miles or less, the extra tankage is just more weight and bulk, even if it doesn't have fuel in it. The mission defines the economics as much as the airframe and engines do.