Default Camera APKs and quality

I have come to a point where I don't remember the camera being so low quality on the Optimus G (maybe due to the time that's passed by and upgrades on newer phones) but I'm curious to know if different camera apks like the LG signed aosp one is better or worse than lets say the G2 camera or google play edition. I know software has to do with improving the quality of the shots to a certain point but again I haven't seen anything for 4.4.X roms. Anyone that can help me out here.