I will list what i found and see the difference.

Canterbury
R2-2 WEMBLEY
R3-5 HEALY CREEK
R5-6 PINS ON PARADE
R6-2 ZAROCK

Ballarat
R1-7 SWEET SCIENCE
R2-10 SPURTACULAR LASS
R4-6 SEA CORAL
R5-8 INSENSITIVE
R6-1 TESTA ROCKETA -3 DANE KEEPER
R7-3 FASTER THAN
R8-12 LATITUDES

Port Lincoln
R2-3 TOOLORA STARR
R4-7 THORTON
R6-8 PLUVIUS
R8-3 BLACK WHISKEY

Muswellbrook
R1-7 CARPE JUGULUM
R2-7 TINTERN ABBEY
R4-8 PINK TIARA
R8-2 PLEASANT GUEST
R9-5 WINNOW

Ipswich
R1-3 MISS STREETEM -4 NOTHIN LEICA RAPID
R2-1 SNIPLAZ
R3-6 SYDNEY OR THE BUSH
R4-3 HEZA ROCKER
R5-3 KALINGA LADY -6 GIDDAY GIDDAY
R6-2 JERSEY JOE
R7-3 QWERTY
R8-2 LAURINEL PRINCESS