Any F-Type of any engine size registered after 1 April 2017 pays the same tax - currently £190 per year.
However, F-Types under five years old (so currently those registered between Dec 2019 and Dec 2024) are liable for a premium vehicle surcharge which takes the tax up to approx £600 a year. When the car turns five years old, this stops and you revert to just paying the basic rate (currently £190).
F-Types registered before Apr 2017 are taxed on their emissions, which vary from model to model.
This breaks it down further...
https://assets.publishing.service.gov.uk/media/6603f64b13397a0011e419be/v149-rates-of-vehicle-tax-for-cars-motorcycles-light-goods-vehicles-and-private-light-goods-vehicles.pdf
So the 2019 model will probably be a cheaper tax rate than the 2015 due to the changes mentioned above.