The Kiwis can't match the Kangaroos as a rule. Only occasionally.
More than the Wallabies have matched the ABs in the last 20 years for sure
If you mean pure athleticism then maybe the Kangaroos beat the Wallabies - but that's just one side.
Maybe? 100%
There wouldn't be much between the top 5-6 Rugby Union nations and the Kangaroos, if anything.
Matt Hansen, Jack Dempsey, Sione Tuipulotu, James Lowe, Bundee Aki and Gibson-Park couldn't make the WBs and ABs squads regularly but they are making international careers in European top nations
Any high profile NRL player can match them. Absolutely, the top 5 League international teams can match the top 5 Rugby Union test teams: Australia, New Zealand, Samoa, England and Tonga.
Now if you talk about the Top 15 there's a HUGE step between the number 6 in Union and the number 6 in League.
Joseph Sua'ali'i could be the next Wallabies superstar according many experts and he's a starter in Samoa. Also they have many HIGH profile Panther Penrith players