Fig. 3 shows the result of deconvolving the observed PSF
using the three computed PSFs. Differences in the structure left in the PSF halo are apparent. There are also substantial differences in flux conservation and in the sharpness of the stellar images among the different restorations, as shown in Table 1 below.
The observed PSF has a total of 74,400 counts, so flux is conserved better with the phase-retrieval PSFs. (The lack of exact flux conservation is due to the CCD readout-noise in the WF/PC data. In the absence of readout noise, the Richardson-Lucy iteration conserves flux exactly.)