Why does the Audi A3 have a smaller cargo capacity compared to other luxury compact cars?

I am in the market for a luxury compact car and have noticed that the Audi A3 has a smaller cargo capacity than its competitors. Why is this the case and should it be a significant factor in my decision making?

The Audi A3 may have a smaller cargo capacity due to its design as a sportier and more performance-oriented vehicle. If you prioritize storage space, you may want to consider other luxury compact cars such as the BMW 3 Series or Mercedes-Benz C-Class.