| Tournament | Round | Betty Irwin | Diana Hilly |
| 23.02.2002 Wollongong (NSW) | 5 | 333 | 370 |
| 22.02.2003 Wollongong (NSW) | 7 | 301 | 379 |
| 19.02.2005 Wollongong (NSW) | 2 | 424 | 330 |
| 16.05.2009 Ulladulla (NSW) | 9 | 321 | 389 |
| 18.09.2010 Ulladulla 2010 (NSW) | 6 | 379 | 360 |
| 18.09.2010 Ulladulla 2010 (NSW) | 14 | 344 | 331 |
| 15.05.2011 Ulladulla (NSW) | 8 | 426 | 371 |
| Head-to-head after 7 games | 4 | 3 | |
| Average score | 361.14 | 361.42 | |
| Spread: | -2 | 2 | |