NSW halfback Mitchell Pearce has likened the challenge of dethroning the all-conquering Queensland State of Origin side to the task facing NRL sides against ruthless ladder-leaders St George Illawarra.

While the Maroons have more to show for their recent domination than the trophy-starved Dragons, Sydney Roosters playmaker Pearce said there were clear similarities in the approach needed to beat either in-form opposition.

In essence Queensland's recent run has allowed coach Mal Meninga to assemble the ultimate club side with the spine of Billy Slater, Darren Lockyer, Johnathan Thurston and Cameron Smith playing an average of seven games a season together for both the Maroons and Australia, their class and familiarity with each other's game giving them a clear advantage.

NRL premiership favourites the Dragons are similarly in tune, having made an art form out of giving their rivals nothing as they suffocate them out of the game.

Asked if NSW's only chance of winning Wednesday's Origin series finale was if Queensland star-studded line-up had an off night, Pearce said: "I don't think so, but we have to play really well.

"It's like when you play the Dragons, either my Roosters team or most sides when they're playing the Dragons this year, if you're not on your game and you're not doing everything right, I don't think you'll win.

"Queensland are probably in that state at the moment where if you're not playing right and doing everything right I don't think you'll win and we know that.

"We've got to execute right, we've got to defend outstandingly and hopefully the results will come our way."

While Queensland's unprecedented five straight series wins had NSW coach Craig Bellamy admitting some of his men may have lacked confidence they could beat the Maroons, Pearce definitely wasn't one.

The 21-year-old is seen as the core around which future NSW sides can be built and he was adamant there was more than enough class in the squad to get the job done.

"There's no doubt there, I don't think you go into any game with these sort of players with doubt," Pearce said.

"They're definitely on top of their game at the moment but we believe they're beatable - any team's beatable if we play to the best of our ability.

"While they have been pretty dominant, with better execution here and there I think there's a win for NSW and that's a our plan on Wednesday - it'd be really nice to go out there and do that in front of the home crowd and shut some people up."

Hooker Michael Ennis claimed the embarrassment and hurt inflicted by the series-clinching 34-6 loss in game two in Brisbane would serve as motivation for the wounded Blues.

"It's still killing me every day - I've never gone into a game more confident," Ennis said of the Suncorp Stadium massacre.

"It's just one of those things that didn't happen and it certainly hurt a lot more than any other loss I've been involved in.

"It gives you great drive and motivation to get that success.

"I think we turned the corner when we walked off the field at Suncorp - it was pretty embarrassing, I know the guys that were involved in that are looking forward to Wednesday that's for sure."

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