Good agreement between LR-TDDFT and TDKS spectra has been demonstrated previously for valence excitation spectra, however the situation is more complicated for core-level spectra. We begin by comparing these two implementations of TDDFT for XAS of simple organic molecules, such as acetone at the carbon or oxygen K-edge as depicted in Fig. . LR-TDDFT/ CVS spectra are shown, based on either 25 or 100 excited states, although the smaller number is sufficient to reproduce the near-edge features. (Throughout this work, we apply 0.7 eV Lorentzian broadening to the LR-TDDFT excitation energies, to obtain a spectrum that can be easily compared to the TDKS result.) Agreement between LR-TDDFT and TDKS is quantitative provided that enough states are included in the LR-TDDFT calculation. The agreement with experiment 84 is also quite good for the near-edge features, because we use the parameterized SRC1-r1 functional along with a basis set of reasonable quality. At higher excitation energies, resonances are too shorted-lived to be observed and the experimental spectrum becomes featureless. Structure persists in the TDDFT spectra because all states have infinite lifetimes due to the use of a compact basis set.