Two Sedans with more similarities, such as the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy, than differences, like the starting price and horsepower. First of all, the 2016 Cadillac XTS is priced $4,555 lower compared to the base MSRP of the 2015 INFINITI Q70. And finally, the 2015 INFINITI Q70 pulls more horsepower than the 2016 XTS. Among similarities are the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy.