The WA NDIS has been delivered by the Western Australian State Government, whereas the NDIS is a national scheme.
The nationally delivered NDIS is available in other states in Australia and is now being made available to people across Western Australia in a phased manner.
Under the WA NDIS it was expected that only 40,000 West Australians would be eligible, however under the national NDIS they estimate 50,000 people will be eligible. You can find out more about the difference between these two schemes in this article by the founder of the NDIS, Bruce Bonyhady: https://probonoaustralia.com.au/news/2017/03/difference-wa-ndis-real-ndis/.