Firstly, the Fiat 500X is significantly larger than the Fiat 500. While the Fiat 500 is available as a hatchback or convertible, the 500X is only available as a crossover SUV. This means the Fiat 500X has more interior space than the Fiat 500, with more headroom, legroom, and cargo space.
Additionally, the Fiat 500X has a wider range of powertrain options than the Fiat 500. However, the Fiat 500X is generally more expensive than the Fiat 500, with a higher starting price and more features and options available at higher trim levels.