Here's a real simple way to find out what the difference is. Go to your local best buy and have them switch between the two modes. If they won't do it, maybe a Gamestop or Ma 'N Pa shop will take the time. Just throwing some suggestions out there. I think asking someone to tell you about difference in image quality is like asking someone a tell you, over the phone, which color paint to buy to paint your room. Everyone's taste and judgement on the issue is going to be a little different.