Which is better, Omega 2500 movement or 8500 movement?

1, according to the public comment network, the power storage time: Omega 8500 movement has longer power storage, 60 hours kinetic energy storage, and Omega 2500 movement has 48 hours kinetic energy storage.

2. Movement winding mode: Omega 8500 movement is bidirectional automatic winding, and Omega 2500 movement is unidirectional automatic winding.