I’d grant the Vatican’s statement is a little open ended, but I certainly wouldn’t call it conditional. Unlike the Archdiocese, the Vatican does not say it is problematic to accept a vaccine using fetal material if an alternative is “available” (whatever that means). The #1 point you pasted says the moral culpability is not at all the same for someone who has no say in what goes into the thing.
If the stances are really the same, you have to ask why the Archdiocese did not reference the Vatican’s views or simply defer to them generally. Especially why they would make the statement at a time when literally the only vaccine “choice” to be made almost anywhere is accepting or rejecting the one you are offered when you are offered it.
The messaging at best is sloppy, but more than anything seems aimed at discouraging folks from getting the J&J vaccine at a time when that means not getting vaccinated at all for a lot of people.