  We study scrambling in connection to multipartite entanglement dynamics in
regular and chaotic long-range spin chains, characterized by a well defined
semi-classical limit. For regular dynamics, scrambling and entanglement
dynamics are found to be very different: up to the Ehrenfest time they rise
side by side departing only afterwards. Entanglement saturates and becomes
extensively multipartite, while scrambling continues its growth up to the
recurrence time. Remarkably, the exponential behaviour of scrambling emerges
not only in the chaotic case, but also in the regular one, when the dynamics
occurs at a dynamical critical point.
