I noticed that the font packages within the postscript psnfss (universal to all TeX distributions) aren't listed in the LaTeX Font Catalogue. It seems that the ones in the Catalog have replacements for the ones inside psnfss,
The packages are different, for example, the catalog has Palladio (a clone of Palitino, which is in psnfss) Other examples are, for New Century Schoolbook: \usepackage{fouriernc} listed in the Catalog, Vs \usepackage{newcent} listed in psnfss. And, for Utopia, \usepackage{fourier} vs \usepackage{utopia}. And, for Charter: \usepackage{bitstream-charter} vs \usepackage{charter}
Helvitica and Avant Garde (both sans fonts) are included in the psnfss set of font packages, but not even listed in the Catalog.
Here's how ctan discribes psnfss
The base set of text fonts covered by PSNFSS are: AvantGarde, Bookman, Courier, Helvetica, New Century Schoolbook, Palatino, Symbol, Times Roman and Zapf Dingbats. In addition, the fonts Bitstream Charter and Adobe Utopia are covered (those fonts were contributed to the Public Domain by their commercial foundries).
I figure the font packages listed in the Catalog are superior or have had additional work and refinements applied. Is that the case and should I use the alternatives from the Catalog rather than from psnfss?