What's the difference between 189 and 19 visas for skilled immigrants in Australia?

Australia's sponsored skilled immigrant visa type 19 is applicable to skilled immigrants who want to work or stay in Australia after being nominated by the Australian state government or regional government. Australia's 19 visa and 189 visa are both permanent residence visas. The only difference is that the holder of 189 visa can settle anywhere in Australia, while the holder of 19 visa needs to live in the nominated state or region for a certain period of time after landing in Australia.