  Physical models of X-ray binary outbursts can aid in understanding the origin
of 'changing-look' active galactic nuclei (AGN), if we can establish that these
two black hole accretion phenomena are analogous. Previously, studies of the
correlation between the UV-to-X-ray spectral index alpha_OX and Eddington ratio
using single-epoch observations of changing-look AGN samples have revealed
possible similarities to the spectral evolution of outbursting X-ray binaries.
However, direct comparisons using multi-epoch UV/X-ray light curves of
individual changing-look AGN undergoing dramatic changes in Eddington ratio
have been scarce. Here, we use published Swift UV/X-ray light curves of two
changing-look AGN (NGC 2617 and ZTF18aajupnt) to examine the evolution of their
alpha_OX values during outburst. We show that the combination of these two
changing-look AGN can trace out the predicted spectral evolution from X-ray
binary outbursts, including the inversion in the evolution of alpha_OX as a
function of Eddington ratio. We suggest that the spectral softening that is
observed to occur below a critical Eddington ratio in both AGN and X-ray
binaries is due to reprocessing of Comptonized X-ray emission by the accretion
disk, based on the X-ray to UV reverberation lags previously observed in NGC
2617. Our results suggest that the physical processes causing the changing-look
AGN phenomenon are similar to those in X-ray binary outbursts.
