Cloned Project Different Flow Trajectory

Hi all,

I feel like i'm losing my mind a little.

I wish to clone my model and make minor changes to the same physical assembly, but alter certain boundary conditions such as inlet / outlet pressure.

The problem that I am having is that I have 'cloned' a study (right clicking the project and cloning), and ran the study from new (remesh / new calculation) without changing any boundary conditions

Despite not changing any boundary conditions, i am witness vastly different results in terms of flow trajectories and surface plots...
My model is really quite basic, so i feel like I am doing something fundamentally wrong.

Any advice would be greatly appreciated.

Annas