What is the difference between 811S and 812S?
Which one would you recommend?
The difference in price is just a few bucks.
812S can be upgraded to a 832S that is a dual layer burner.
812s can write -R @ 8x, 811s @ 4x only. This is only academic as the liteons are not very good -R writers and there are not many good 8x -R media around.
My choice: 812s - possible upgrade to 832s & more mature product.
812S all the way.