| Tournament | Round | Betty Irwin | Liz Jackman |
| 11.02.2006 Wollongong (NSW) | 2 | 367 | 352 |
| 12.11.2006 Blackbutt Inaugural (NSW) | 7 | 387 | 327 |
| 20.05.2007 Ulladulla 2007 (NSW) | 7 | 346 | 370 |
| 16.05.2009 Ulladulla (NSW) | 6 | 335 | 354 |
| Head-to-head after 4 games | 2 | 2 | |
| Average score | 358.75 | 350.75 | |
| Spread: | 32 | -32 | |