When looking at both PCP and leasing you may not notice much difference due to both requiring an initial payment and smaller monthly payments which continue throughout a period of your chosen contract!
There is one key difference between PCP and leasing and that is that PCP allows you to own the vehicle.
At the end of your contract, your PCP plan will give you the choice of making a payment or returning the car. Leasing will require you to return the vehicle at the end of your contract!