This. We always talk about how crap the Aussies were against the Kiwis but for most of Super Rugby was any one country (not team) consistently good?
Most definitely yes.
Finals appearances i.e. the final
Crusaders (NZ) 14 appearances - 10 wins and 4 losses
Blues (NZ) 4 appearances - 3 wins and 1 loss
Chiefs (NZ) 3 appearances - 2 wins and 1 loss
Hurricanes (NZ) 3 appearances - 1 win and 2 losses
Total NZ final appearances 24 - for 16 wins
Brumbies (AU) 6 appearances - 2 wins and 4 losses
Waratahs (AU) 3 appearances - 1 win and 2 losses
Reds (AU) 1 appearance - 1 win and 0 losses
Total AU final appearances 10 - for 4 wins
Sharks (SA) 4 appearances - 0 wins and 4 losses
Bulls (SA) 3 appearances - 3 wins and 0 losses
Lions (SA) 3 appearances - 0 wins and 3 losses
Stormers (SA) 1 appearance - 0 wins and 1 loss
Total SA final appearances 11 - for 3 wins
Jaguares (ARG) 1 appearance for 0 wins and 1 loss
2 x NZ teams played each other in the final on 5 occasions - 98, 99, 03, 06 and 15
2 x SA teams played each other in the final on 2 occasions - 07 and 10
2 x AU teams never played each other in the final
At least 1 NZ team featured in the final in 23 years out of 25