For CH 2 NH + 2 (Figure ), the transition from the first excited state (S 1 ) to the ground state (S 0 ) is marginally better captured when comparing PaiNN-and SchNet-based SpaiNN models evaluated against quantum chemistry reference simulations. This is evidenced by the characteristic lifetime of S 1 obtained from a sequential kinetic model, which is 30 fs and 50 fs for SchNet-and PaiNN-based SpaiNN predictions, respectively, whereas the reference value is 59 fs. Nevertheless, employing both SchNet and PaiNN-based SpaiNN models in SHARC simulations yields reasonable photodynamics results, aligning with previous analyses and findings from related studies. The background color is white in regions where SpaiNN models yield reasonable results, as determined by the total energy of the molecules at each timestep, while other regions are shaded gray. Kinetic rate constants for a sequential kinetics scheme were derived using KiMoPack and are presented alongside the population plots. Bold numbers denote the excited-state lifetimes as obtained from reference calculations, the ML lifetimes are given in parenthesis.