| Tournament | Round | Marge Roberts | Anne Stewart |
| 01.06.2008 WA Championships (WA) | 5 | 288 | 446 |
| 06.06.2016 WA Championship (WA) | 1 | 354 | 359 |
| 03.06.2019 WA Championship (WA) | 1 | 294 | 330 |
| 06.08.2023 Glenys Lawrie Memorial (WA) | 3 | 334 | 342 |
| 12.01.2025 January Open (WA) | 3 | 320 | 438 |
| 01.06.2025 WA Championship 2025 (WA) | 1 | 339 | 440 |
| Head-to-head after 6 games | 0 | 6 | |
| Average score | 321.5 | 392.5 | |
| Spread: | -426 | 426 | |