Ted Newsom wrote:
So then, based on the progression of the drafts, the minor differences and overwhelming similarities, Bradbury's oft-repeated anti-Hollywood rant about writing two stories, one shttty and one Real Bradbury, is self-serving twaddle with no anchor in objective reality... correct?  And Bill Alland, like him or hate him, was essentially telling the factual truth when he called bllshhttt on Bradbury's version of events.  Correct?
Huh?  I thought what's been discussed here made it clear that Bradbury did do a studio draft (three, with a few changes from one to the next) and one Bradbury draft.  From the quote Tom posted above from Universal Horrors: 
The 40 years-plus and dozens of movie and TV credits between It Came from Outer Space and our interview had obviously blotted out the two-treatments incident in Alland's mind; Bradbury's version must be true because the two treatments still exist.