| Tournament | Round | Kathryn Tiffen | Mary-Michal Oxby |
| 08.08.2009 Empire Bay (NSW) | 5 | 371 | 338 |
| 07.08.2010 EMPIRE BAY 2010 (NSW) | 5 | 324 | 314 |
| 29.03.2015 EMPIRE BAY MINI (NSW) | 5 | 341 | 292 |
| 25.10.2015 Empire Bay Mini (NSW) | 6 | 299 | 457 |
| 29.11.2015 Central Coast Championships (NSW) | 3 | 331 | 312 |
| 04.06.2016 Central Coast (NSW) | 6 | 424 | 378 |
| 27.10.2019 Empire Bay Oct (NSW) | 2 | 298 | 354 |
| 27.10.2019 Empire Bay Oct (NSW) | 2 | 298 | 354 |
| Head-to-head after 8 games | 5 | 3 | |
| Average score | 335.75 | 349.87 | |
| Spread: | -113 | 113 | |