These two Bentley Continental models are two modifications of the same model with one major difference, the modifications. First of all, there is a notable difference in the starting price of the 2018 Bentley Continental GT Speed, which is $58,300 less than the base MSRP of the 2018 Bentley Continental GT Supersports. Also, the 2018 Continental GT Supersports has a more powerful engine than the 2018 Continental GT Speed. Among similarities are the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy.