Q: for the x5
A: About the same, can you really feel through your clothes that critically? Nappa will be softer but more fragile, but smells nice when clean and new. Preforated will be cooler in the summer, but it is more 'firm' If you plan to eat and drink in the car, then dont' get preforated! BMWs are very sensitive to getting coffee spills on the SRS sensors in the seats. Enjoy the new X5! Congrats!