| Tournament | Round | Colleen McCormick | Janet Cotter |
| 15.02.1998 Fremantle (WA) | 1 | 348 | 389 |
| 26.04.1998 Nedlands (WA) | 1 | 373 | 363 |
| 19.09.1999 Spring Subiaco (WA) | 3 | 392 | 334 |
| 27.03.2000 Nedlands (WA) | 5 | 336 | 401 |
| 25.06.2000 Advanced Intermediate Recreation (WA) | 3 | 351 | 347 |
| 12.08.2001 Yokine (WA) | 1 | 302 | 379 |
| 06.02.2005 Fremantle (WA) | 1 | 342 | 354 |
| 27.02.2005 Kwinana (WA) | 4 | 430 | 265 |
| 09.04.2006 Nedlands (WA) | 1 | 379 | 277 |
| Head-to-head after 9 games | 5 | 4 | |
| Average score | 361.44 | 345.44 | |
| Spread: | 144 | -144 | |