If you're viewing on an oldish non-widescreen CRT you probably won't benefit from the increased video bitrate of the dual layer version, plus the single layer version has no extras menu

I can see all the menu options fine on my 28" widescreen Sony Trinitron, I got it 2nd hand and found the overscan to be too much so found the code for going into the service menu and adjusted the picture so the overscan is as small as possible without seeing the small black borders on broadcasted material.
(a tip for anyone going into a tv service menu, DON'T! took bloody weeks of tweaking it so the picture looked 'right', if you thought the trapeizoid etc. was difficult to adjust right on PC monitor you ain't seen nothing)