| Tournament | Round | Janet Cotter | Jenny Coetzee |
| 20.09.1998 Advanced Intermediate Recreation (WA) | 2 | 372 | 431 |
| 13.02.2000 Fremantle (WA) | 2 | 312 | 400 |
| 08.10.2000 Rockingham (WA) | 4 | 443 | 323 |
| 21.10.2001 Rockingham (WA) | 4 | 382 | 364 |
| 14.07.2002 Bassendean (WA) | 3 | 397 | 401 |
| 08.09.2002 Yokine (WA) | 4 | 337 | 344 |
| 06.04.2003 Nedlands (WA) | 3 | 348 | 325 |
| 30.11.2003 Hamersley (WA) | 1 | 321 | 293 |
| 11.01.2004 January Maximin (WA) | 2 | 351 | 320 |
| 29.08.2004 Yokine (WA) | 6 | 293 | 480 |
| 10.04.2005 Nedlands (WA) | 6 | 281 | 413 |
| Head-to-head after 11 games | 5 | 6 | |
| Average score | 348.81 | 372.18 | |
| Spread: | -257 | 257 | |