Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the powertrain, fuel economy, market segment, starting price, and horsepower. First of all, a bigger engine usually means less mpg. But the 2015 INFINITI Q70 Hybrid has a more powerful engine and it gets 12 more mpg than the 2016 Cadillac XTS. Also, there is a $10,605 difference in the base MSRP. The 2015 INFINITI Q70 Hybrid has a higher starting price than the 2016 XTS. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.