salt beaf uses a different part of the cow and is left in the brine longer than corned beef so that the brine penetrates the meat more, plus the brine is a lot more concentrated and this is why salt beef must be soaked in fresh water for a period of time and if you start with the cabbage in the pot , ad turnip, carrots and lastly potatoes at certain intervals(round an hour for the cabbage and half an hour for everything else) then everytihng will be cooked at the same time so that no 'jigging' is required. I believe warsaw will to be the most accurate and believable answer to the jiggs dinner name.