PKG files, conversely, are compressed archives. They only contain the actual game data, assets, and code required to run the game. This means:
Newer versions of ShadPS4 have moved away from direct PKG support in favor of GP4 projects or raw game dumps to reduce user confusion during the conversion process. ps4 pkg roms better
PKGs are the standard format for not just games, but also updates (patches) and DLC , allowing for simple, layered installations. Emulation Perspective (ShadPS4) PKG files, conversely, are compressed archives
You can install a newer update PKG over an old version without rebuilding the entire game file. but also updates (patches) and DLC