| Tournament | Round | Bettina Tonkin | Anne Zion |
| 21.04.2002 Nedlands (WA) | 6 | 261 | 367 |
| 08.09.2002 Yokine (WA) | 6 | 345 | 466 |
| 29.09.2002 Manjimup (WA) | 1 | 353 | 347 |
| 20.10.2002 Rockingham (WA) | 2 | 319 | 366 |
| 10.11.2002 Coogee (WA) | 3 | 332 | 401 |
| 31.05.2003 Western Australian Championships (WA) | 12 | 427 | 315 |
| 30.11.2003 Hamersley (WA) | 1 | 327 | 388 |
| 30.08.2009 Winter Open (WA) | 4 | 373 | 331 |
| 05.03.2012 BINDOON 2012 (WA) | 1 | 310 | 477 |
| 07.12.2014 Dec OPEN (WA) | 6 | 297 | 356 |
| 10.12.2023 Graham Bell Memorial (WA) | 2 | 349 | 477 |
| 11.08.2024 Glenys Lawrie Memorial (WA) | 6 | 353 | 390 |
| Head-to-head after 12 games | 3 | 9 | |
| Average score | 337.16 | 390.08 | |
| Spread: | -635 | 635 | |