| Tournament | Round | Duncan Smith | Richard Birch |
| 14.02.1998 Wollongong WORDS Valentine (NSW) | 6 | 338 | 359 |
| 13.02.1999 Wollongong (NSW) | 8 | 261 | 465 |
| 04.12.2004 North Shore (NSW) | 3 | 357 | 366 |
| 07.01.2017 Janboree (NSW) | 3 | 397 | 355 |
| 06.01.2018 Janboree (NSW) | 8 | 319 | 345 |
| 04.01.2020 JanBoree (NSW) | 4 | 470 | 283 |
| Head-to-head after 6 games | 2 | 4 | |
| Average score | 357 | 362.16 | |
| Spread: | -31 | 31 | |