| Tournament | Round | Gillian Briggs | Betty Mitchell |
| 23.03.2001 South Australian Championships (SA) | 7 | 427 | 329 |
| 28.12.2007 SA Christmas Leftovers (SA) | 5 | 469 | 309 |
| 14.11.2009 Southern Tournament (SA) | 3 | 396 | 374 |
| 07.02.2010 SA February (SA) | 4 | 290 | 427 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 395.5 | 359.75 | |
| Spread: | 143 | -143 | |