| Tournament | Round | Erica Williams | Joan Colburt |
| 03.05.1998 Maelstrom (QLD) | 7 | 335 | 390 |
| 23.08.1998 Queensland Championships (QLD) | 3 | 359 | 400 |
| 31.10.1998 Redland Bay (QLD) | 6 | 343 | 375 |
| 23.05.1999 Brisbane Open (QLD) | 4 | 490 | 293 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 381.75 | 364.5 | |
| Spread: | 69 | -69 | |