Questions about Smart Scope

So it’s known that the Halo 2 BR in Halo 5 has a faster smart scope time than the standard BR. Does this mean that normal smart scope is slower than the zoom in previous Halos or does the Halo 2 BR in Halo 5 zoom in faster than before?

Its called smart link, but I just think that previous halos didn’t have the animations of you pulling the gun up so that is why it is a faster to zoom.