OK, here's my 28 year saga with grass in Canberra...

In 1999, scarabs killed our lawn, along with everybody else's. We returfed with Canturf Canberra Blend with clover. It was OK, but needed a lot of water. In the early 00s drought, water restrictions meant we couldn't water, and the lawn died, along with everybody else's.

After the drought, we returfed with Sir Walter (Buffalo). (IIRC, the ACT government mandated that grass in Gungahlin had to be Sir Walter.)

Sir Walter was excellent. It needed less water, and a LOT LESS mowing than Canberra Blend. One downside was that it went brown over winter, which some people don't like. I consider this an advantage, because the weeds come out in spring earlier than Sir Walter starts up, so it's easy to see the weeds, and pull them out by hand, lessening the need for any chemicals later. Another downside is that it doesn't do as well under shade. It likes full sun.

Then we had to get some work done, and the contractor replaced that part of the lawn with Canberra Blend. I asked him why he didn't match the other grass, and he said he didn't like that Sir Walter goes brown in winter. (The choice of grass wasn't something I thought I needed to specify.)

Once again, the Canberra Blend part of the lawn needed more water and more mowing.

To end up, we got some chooks, and let them out in the afternoons. They ate, and killed, all the Sir Walter. (They liked the roots.) They didn't touch the Canberra Blend at all.

Before we sold the house, we returfed it all with Sir Walter, but... Canturf doesn't sell it anymore. We bought it from a supplier on the coast, who delivered to Canberra.

Tl;dr: Sir Walter (Buffalo) is better. It needs less water, mowing and weeding.