Although there are some similarities, these two are different in most aspects such as body structure, fuel economy, ground shadow size, market segment, horsepower, and maximum occupancy. First of all, there is a significant difference between body structures and exterior dimensions. The 2015 BMW i3 is a Hatchback, while the 2016 Lexus NX 300h is an SUV. It is also significantly smaller. Also, the 2016 NX 300h has a more powerful engine and gets 89 mpg less than the 2015 i3. In addition, there is a difference in the number of passengers; the NX 300h seats one more the i3. Among similarities are the market segment and starting price.