Since you specified "Repack," you are likely looking at a compressed pirated version (commonly by groups like FitGirl, DODI, or KaOs). The "useful features" of a Repack specifically are:
The primary draw of the Remastered version is its significant graphical facelift. Deep Silver Volition and Sperasoft overhauled nearly every asset, including environments, character models, and visual effects. The lighting engine was entirely rebuilt, introducing more realistic reflections and global illumination that make the fictional city of Steelport feel more vibrant than ever. According to the Steam store page Saints Row The Third Remastered-Repack
The Remastered edition isn't a simple resolution bump; it features a comprehensive graphical overhaul: Since you specified "Repack," you are likely looking