@Crayon_ 189, 190, 489/491 are all Permenant Resident Visas. the only difference is yung state limitations.
189 does not have any state limitation, ibig sabihin, kahit saang state ka sa Australia pde magwork at tumira.
190 is given by each state meaning, you have to stay (work and live) sa state n yun within that number of years.190 allows you to work and live both in Metropolitan and Regional areas.
489/491 is given by the state, ult, but limited ka to a certain regional area, hnd ka pde lumipat ng region or state or even find work s Metropolitan area. Metropolitan areas are Melbourne, Sydney, Brisbane and Perth. So for example, 489/491 ka sa region ng Geelong dito sa Victoria, kelangan sa Geelong ka nakatira at nagtatrabaho. Hnd pde sa Geelong ka nakatira pero ang work mo is nsa Melbourne. But same with 190, that is only for a certain number of years, then pde ka na rin lumipat ng region and state.