I know its common for people to say NRL>>>>>> Super League, and its probably true for the most part, but the one area Super League blows NRL out of the water is atmosphere. An NRL top 4 match with 20k+ in attendance has all the atmosphere of a Thursday afternoon baseball game in July, some light applause and make a bit of cheering if a try is scored.
A Super League match with a third or fourth of the attendance will have several times the atmosphere, making the match seem like something important. Unfortunately, Super League is on some obscure network in the US, making it impractical to watch for several years now, but I regularly watch old super league or challenge cup matches just to get that atmposhere fix.
If they could just get their business side together, I have no doubt it could be Super League >>>>>> NRL