Washington (CNN) A top aide to Donald Trump is saying he will show CNN's Chris Cuomo how much Trump pays the women in his organization if other candidates -- from both parties -- do the same.

"The thing about Mr. Trump's leadership is really about proof of performance," Trump Executive Vice President Michael Cohen told CNN's Chris Cuomo on "New Day" Monday. "Unlike the others -- like Hillary (Clinton) ... said that she's the only one that can really understand women's rights and so on -- Donald Trump's been living this for more than 30 years. He's not a gender-based payer. He's really a performance-based payer, meaning if you do the job he doesn't care if your name is Mary or it's Joe."

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The only catch to Trump's promise is that, if the other campaigns come through, Cohen said the details have to be kept private, as proprietary information, and only be used to confirm or invalidate Trump's contention that he pays women better than the other candidates.

"I would welcome you to come in -- I would have you sign an NDA (non-disclosure agreement) and you could take a look," Cohen said.

Cohen offered a peek at the Trump organization's pay, saying that while there are more men in the company, female executives in similar roles are making as much or more than their male counterparts, citing an example of an assistant general counsel who makes $25,000 more than her male counterpart.