The RePack By CorePack version of the game appears to be a repackaged version of the original game, likely including all the original content. The repackaged version is designed to be more convenient for players, with a smaller file size and easier installation process.
The repackaging phenomenon has also made the game more accessible to a wider audience, allowing PC gamers who may not have been able to experience the game otherwise to enjoy it. However, it's essential to acknowledge the controversy surrounding game repacking and its implications on the gaming industry.
Original game files are often 40-50GB; repacks can be half that size.