| Tournament | Round | Betty Irwin | Maree Heynen |
| 11.09.2005 Hills Open (NSW) | 6 | 313 | 298 |
| 28.05.2006 Ulladulla Championship (NSW) | 14 | 419 | 294 |
| 17.06.2006 Wollongong Marj Babb (NSW) | 7 | 411 | 301 |
| 14.06.2008 Wollongong (NSW) | 1 | 268 | 333 |
| 31.10.2009 Nowra 2009 (NSW) | 13 | 401 | 344 |
| 31.10.2009 Nowra 2009 (NSW) | 14 | 422 | 291 |
| 15.05.2011 Ulladulla (NSW) | 9 | 293 | 340 |
| 15.05.2011 Ulladulla (NSW) | 13 | 499 | 307 |
| Head-to-head after 8 games | 6 | 2 | |
| Average score | 378.25 | 313.5 | |
| Spread: | 518 | -518 | |