[Eury]

They're really 2 totally different classes of gyro. If I were putting one in a scale fuse, I'd absolutely buy the 401/9254 combo. It's a simple to setup gyro that is extremely reliable. It's one of those pieces of equipment that works perfectly, first time, every time, for everyone. It also holds the tail very well. The 720 is also awesome, but the setup isn't plug and play, and it is more expensive. If you were doing hard 3d, I'd say go 720, but with how you're using it, the 401 is the only choice.