). BH and EF convey qualitatively different pictures of the same nonadiabatic dynamics . In BH, multiple nuclear amplitudes, that we will also refer to as wavepackets, evolve on different PESs and transfer amplitudes in regions of strong nonadiabaticity, as avoided crossings and conical intersections, where the nonadiabatic couplings are large or even singular. In BH, the populations of the electronic adiabatic states are determined as ρ k (t) = |χ k (R, t)| 2 dR. In EF, the nuclear wavefunction evolves in time since the TDVP and the TDPES change in time according to the electronic dynamics represented by the evolution of the electronic conditional amplitude. At this level of representation, it is not possible to resolve the nuclear dynamics in terms of adiabatic contributions. Nonetheless, the populations of the adiabatic states can be determined as