Although there are some similarities, these two are different in most aspects such as model year, body structure, powertrain, fuel economy, ground shadow size, market segment, and horsepower. First of all, there is a difference in model years. The is 3 years newer. Also, there is a significant difference between body structures and exterior dimensions. The 2021 Bolt EV is a Hatchback, while the 2018 Clarity Plug-in Hybrid is a Sedan. It is also significantly smaller. In addition, the Clarity Plug-in Hybrid has a more powerful engine and gets 76 mpg less than the Bolt EV. Among similarities are the starting price and maximum occupancy.