ok, so just a few tweaks here and there? To be honest, even the released versions of old tracks were they kept the OG beat I still prefer the OG because they tweak production a bit
ex. Runnin On E
On released version they keep the beat constant but on OG the beat changes (they take out a layer or 2) like when pac says "grabbin my dick I'll never learn, take away the pain with sherm", u can notice the difference on both versions.