Expect the Sydney horses to continue the Brisbane domination next Saturday.
Waller has Senor Toba ($4) and Achiever ($15) running in the Group 1 Queensland Derby this week.
Assistant trainer Charlie Duckworth said punters should be looking at the weather when deciding which one to back.
“It’s really interesting with those horses and it’s a good position for the stable to be in because one is unbeaten on good tracks and the other is pretty much unbeaten on a heavy track,” Duckworth said.
“See what the weather does and you’ll know which one you’ll want to be on. They’ve got completely different racing patterns as well so it’s hard to gauge.