If you buy a fast track, you usually don’t need to buy a bond. Fast lanes are meant to get you into attractions faster, while guaranteed tickets are usually for certain attractions. Based on the information you’ve provided, there’s mention of fast lane guarantees for Mario, but no explicit mention of Harry Potter. This could mean that the Harry Potter experience may require an additional bond or that Express Entry itself may already include a guarantee for the experience. It is recommended that you check official information or contact customer service to confirm specific details.