| Tournament | Round | Janet Cotter | Colleen McCormick |
| 15.02.1998 Fremantle (WA) | 1 | 389 | 348 |
| 19.09.1999 Spring Subiaco (WA) | 3 | 334 | 392 |
| 27.03.2000 Nedlands (WA) | 5 | 401 | 336 |
| 12.08.2001 Yokine (WA) | 1 | 379 | 302 |
| 06.02.2005 Fremantle (WA) | 1 | 354 | 342 |
| 27.02.2005 Kwinana (WA) | 4 | 265 | 430 |
| 09.04.2006 Nedlands (WA) | 1 | 277 | 379 |
| Head-to-head after 7 games | 4 | 3 | |
| Average score | 342.71 | 361.28 | |