No, I believe the pricing is identical to the corresponding xONEx product, the only difference being mileage limited, so price per mile is approx double (as the OWE typically route for twice the mileage). The sole advantage of the Circle fares is that they allow using several airlines which are excluded from the OWE product (for example, JL), thereby including some cities which are otherwise unreachable, and making possible more time-prudent routings. So in general the Circle fares sell convenience, and not a cheaper price.