I also went to the Def Leppard show in 2008. The setlist difference is minimal...

2011 Perth Setlist
1. Undefeated
2. Let's Get Rocked
3. Animal
4. Foolin'
5. Let It Go
6. Make Love Like a Man
7. Love Bites
8. Rock On (David Essex cover)
9. Rocket
10. Two Steps Behind
11. Bringin' on the Heartbreak
12. Switch 625
13. Hysteria
14. Armageddon It
15. Photograph
16. Pour Some Sugar on Me

Encore:
17. Rock of Ages

2008 Perth Setlist
1. Rocket
2. Animal
3. C'mon C'mon
4. Foolin'
5. Make Love Like a Man
6. Nine Lives
7. Love Bites
8. Two Steps Behind
9. Bringin' on the Heartbreak
10. Switch 625
11. Hysteria
12. Armageddon It
13. Photograph
14. Pour Some Sugar on Me
15. Rock of Ages

Encore:
16. Bad Actress
17. Let's Get Rocked

I do love this band but they really need to switch things up a bit regarding the setlist. Having said that, they are a great live band.