I have found it very similar actually.
Doing the WHV and living in one place for a set period whilst working.....feels like what I am doing now in my life.
I work, I have expenses, I buy things, I commute, I often do touristy and leisure things in my downtime. Did this on the WHV and I do it now.
The only real difference now is a permanent stay and I have a better cash flow than when I was backpacking.
From myself and many people I know, if you have spent a year here on a WHV prior, you are 99.99% almost guaranteed to settle in and be happy here long term. Because you already know what to expect and you are use to living independently away from your family and friends.