| Tournament | Round | Barbara Senior | Betty Billing |
| 24.05.1998 South Australian Championships (SA) | 1 | 287 | 304 |
| 14.02.1999 South Australian Championships (SA) | 3 | 402 | 295 |
| 13.02.2000 South Australian Championships (SA) | 2 | 394 | 344 |
| Head-to-head after 3 games | 2 | 1 | |
| Average score | 361 | 314.33 | |
| Spread: | 140 | -140 | |