With financing you pay off the vehicle in instalments and become the owner at the end. This pays off if you keep the car for a long time and want full control over it.
Leasing means usage for a monthly rate, usually with a fixed term and mileage limit. The advantage: predictable costs and a new vehicle regularly – but the car does not belong to you.
Watch the effective annual interest rate, down payment, residual value and possible extra costs. With leasing, excess mileage and damage matter at the end.
Rule of thumb: if you value ownership and long-term use, financing works well. If you appreciate flexibility and predictability, leasing may be the better choice.