I think you two are correct.

Because of the voluminous notes Tuffy DeLuna kept regarding all the monetary collections and payoffs from the LV casino skim, which led to the arrests, trials, convictions, and long jail terms the Chicago, Cleveland, KC, and Milwaukee crews received, it was said that his actions were rat moves that put everyone in the soup.

But in actuality, he hadn't done it on purpose to give anyone up. The meticulous records he kept was because he was afraid of fucking up other guys monies and getting in trouble for mismanagement of the casino skim.

So I gotta agree, I don't believe he turned "rat" per se. He only messed up badly which "led" to the extensive prosecution evidence that was used to convict them all. He also went to the can for a lengthy period.
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Note: I also don't know where I had gotten the specific term that DeLuna had ratted. But for me to include it, It must have been clearly stated somewhere and obviously it's wrong.
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What I do know is that after their convictions, Joey Aiuppa and the other Chicago bosses viewed all the Kansas City guys; Civella, DeLuna, etc., as "persona non-grata" because of the way they're stupidity brought everyone down.

In fact, it was documented by the feds and printed in the papers that Chicago broke off all ties and communication with the Civella Family afterwards. It created a lot of bad blood between them. So much so, that when Aiuppa and Carl Civella were in the federal prison hospital infirmary together, Aiuppa wouldn't even look at Civella, and Corky couldn't even get an "verbal audience" with Aiuppa anymore.
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But good catch men! .... (at least I know your reading my articles closely) Lol

Like the man said, "nobody's perfect".... but we try! Lol