We know that Alito’s draft may change before the final opinion is issued. What makes this situation unique is our ability to compare the draft with the opinion, and to speculate as to the reasons for any changes.
I don’t expect to see many meaningful differences. What you should be looking for is any revisions to the language which emphatically distinguishes abortion from other culture war legal issues in spite of a mode of analysis that potentially encompasses far more than abortion. It would be extremely embarrassing for the majority to accept the current language and then find a few years later, for example, that same-sex marriage is a recently invented, bogus right that didn’t exist at the time the Fourteenth Amendment was ratified.
If the distinction language is watered down, and you’re gay, be very afraid, because the Court is coming after you.