| Tournament | Round | Betty Irwin | Janine Whittaker |
| 23.11.2003 ACT Championships (ACT) | 4 | 366 | 321 |
| 19.02.2005 Wollongong (NSW) | 1 | 258 | 308 |
| 17.06.2005 Wollongong Marj Babb (NSW) | 3 | 381 | 326 |
| 17.06.2006 Wollongong Marj Babb (NSW) | 5 | 378 | 383 |
| Head-to-head after 4 games | 2 | 2 | |
| Average score | 345.75 | 334.5 | |
| Spread: | 45 | -45 | |