In this video I make an honest, albeit subjective, comparison of the features of the S&box Game Engine and the Unity Game Engine. I show where they stack up and where each outshines the other.
I have many years working in Unity and am very excited about S&box as an alternative, but S&box still has some issues worth discussing.
Note, S&box is still in development, so I didn't cover performance. The Facepunch team has been releasing updates frequently and I expect performance to continue to improve.