I think you will find it goes like this in ranking of the leagues!
NRL
SL
Aussie divisionial comp
Barter card
NL1
I can not see how it could be thought of any differently than that??Barter card and NR1 would be close, but i would expect the Barter card to be at a higher level because in NZ there is only one NRL team to take players from the Barter card teams.