| Tournament | Round | Betty Irwin | Heather Sorensen |
| 05.12.1999 ACT Christmas Capers (ACT) | 10 | 391 | 312 |
| 27.05.2001 Ulladulla (NSW) | 7 | 399 | 292 |
| 09.12.2001 ACT Championships (ACT) | 8 | 341 | 299 |
| 26.05.2002 Ulladulla (NSW) | 2 | 407 | 352 |
| 23.11.2003 ACT Championships (ACT) | 12 | 384 | 328 |
| 21.02.2004 Wollongong (NSW) | 6 | 343 | 359 |
| 22.05.2005 Ulladulla (NSW) | 11 | 377 | 356 |
| 28.05.2006 Ulladulla Championship (NSW) | 5 | 351 | 390 |
| 17.06.2006 Wollongong Marj Babb (NSW) | 2 | 404 | 325 |
| 20.05.2007 Ulladulla 2007 (NSW) | 10 | 365 | 346 |
| 18.05.2008 Ulladulla (NSW) | 2 | 318 | 395 |
| 14.06.2008 Wollongong (NSW) | 7 | 261 | 395 |
| 02.11.2008 Nowra Bomaderry 2008 (NSW) | 5 | 331 | 387 |
| 02.11.2008 Nowra Bomaderry 2008 (NSW) | 12 | 416 | 358 |
| 31.10.2009 Nowra 2009 (NSW) | 6 | 287 | 372 |
| 06.11.2010 Nowra (NSW) | 12 | 311 | 385 |
| Head-to-head after 16 games | 9 | 7 | |
| Average score | 355.37 | 353.18 | |
| Spread: | 35 | -35 | |