Seat Leon Cupra or BMW 3

Hello everyone, I’m new here, and I need your advice right away. I know that you can’t compare the two cars mentioned above directly, but I still want your advice. I would like to buy a Seat Leon Cupra 280 with DSG. I only need the car to work and to have fun from time to time. I drive around 15km easy distance and sometimes four or two children. The car is then occasionally left to my wife, i.e. we fa We exchange our cars occasionally, depending on what happens. And that’s exactly where the problem lies. My wife doesn’t want a seat but rather a BMW of 3. She tries to make me a 328i tasty. I configured the Cupra once in the net and come via an intermediary on about 31k. I have been offered the BMW as an annual car with automatic and good equipment for 29k. Therefore the budget is about 30k. Which car would you the Buying the Cupra as a new car or the BMW as an annual car? Or alternative: how can I make my wife taste a seat? Thank you for your answers in advance. Markus