| Tournament | Round | Joan Colburt | Marilyn Smith |
| 03.05.1998 Maelstrom (QLD) | 5 | 329 | 405 |
| 17.05.1998 Southport Winter (QLD) | 4 | 347 | 357 |
| 23.08.1998 Queensland Championships (QLD) | 5 | 409 | 393 |
| 13.09.1998 Toowoomba (QLD) | 5 | 424 | 396 |
| 11.10.1998 Greenbank (QLD) | 6 | 530 | 382 |
| 31.10.1998 Redland Bay (QLD) | 2 | 414 | 339 |
| 15.11.1998 Oyez (QLD) | 2 | 408 | 415 |
| 02.05.1999 Maelstrom (QLD) | 7 | 303 | 393 |
| Head-to-head after 8 games | 4 | 4 | |
| Average score | 395.5 | 385 | |
| Spread: | 84 | -84 | |