What is a common feature of F-16 pylons compared to F-15 pylons?

F-16 pylons are designed to be jettisonable, which provides the aircraft with increased flexibility during combat situations. This feature allows the F-16 to drop external stores quickly if needed, enhancing its maneuverability and reducing drag when the drop is advantageous. On the other hand, F-15 pylons are typically not designed for jettisoning under normal operational conditions, as their primary purpose is to support heavier payloads and engage in different types of combat scenarios.

Thus, the correct answer reflects the distinct configuration and purpose of the pylons on both aircraft. The statement that only one type is jettisonable accurately indicates that the F-16 pylons can be released in flight while the F-15 pylons generally cannot, underscoring the operational design differences between the two fighter aircraft.