| Tournament | Round | Colleen Birch | Dianne Davis |
| 05.04.2010 Aus Championship (SA) | 13 | 355 | 357 |
| 25.04.2011 Aus Championship (ACT) | 24 | 407 | 407 |
| 17.04.2016 Tristate Challenge (NSW) | 6 | 478 | 229 |
| 02.04.2018 2018 National Championship (ACT) | 19 | 326 | 423 |
| Head-to-head after 4 games | 1.5 | 2.5 | |
| Average score | 391.5 | 354 | |
| Spread: | 150 | -150 | |