If you check the figures, the 90kWh I-Pace does 'over 310 miles' and the Model X 90D does 303 miles (both NEDC)At the moment, given the information we have, you will pay for a 90 kWh battery in the I-Pace but get 60 kWh battery range. The reported efficiency is absolutely terrible... much worse than a Model X. Also, we don't know the cycle life and the efficacy of its battery thermal management systems. Given that it is a Model 3 size, the Model Y is the actual competitor but like the Bolt, it will probably be available for a year before the Y. But the 3 will be on the market at the same time with greater range for lower price.
60kWh would give it a 210 mile range
Yes, I know it is a smaller car, but your argument is way, way out
Also given what we have heard from the Model 3, The Model Y won't have a battery greater than 80 kWh and therefore a range of about 310 miles
Therefore they will both have similar ranges