I'd say within Aus, NZ and England their League sides would pump their Union equivalents in a hypothetical cross-code game
Wow... that's stupid beyond belief...
First, while our (NZ) league team is very strong, make no mistake the best talent in NZ plays union - the All Blacks are pretty much an exception to every rule, no other international team in any sport comes close - even in league where there are few nations, the Kangaroos have not always been dominant - the Kangaroos from the 80s until recently
![Smile :) :)](/data/emoji/263a.png)
are an example of what the All Blacks have pretty much always been like in the face of greater competition
Also, the Sam Burgess example (and SBW, Thorn and others) shows that being an elite league player does not immediately make you an elite union player - as SBW and Thorn showed - it takes time.
In contrast, great union players like Michael O'Connor made the transition the other way pretty quickly, as did less stellar ones like Ridge, Halligan, Sherlock, Gourley, Innes, Deveraux etc... the games are different - league simpler, and better imo - but if you actually watched union you'd see some serious talent there (as did league recruiters previously when they could poach)