I like to imagine there are infinite universes with slightly different starting conditions/cosmic constant values. Lots of them are non-starters for living observers because their fundimental forces didnt match up right to condense matter into stars after the big bang. Some universes like ours turn out to be goldilocks that balance the forces just right to for matter to assemble into structure and complexity.

Then for each particular universe theres an almost infinite amount of possible spacetime trajectories for matter to structure itself into from beginning big bang to ending heat death. Each unique possible state the universe could choose to become through probability as it progresses in time becomes its own branching divergent timeline, so like many worlds interpretation.

So no I don’t think they are the same thing. There are infinite universes with different seed values, and each one of them contains their own set of infinite possible timelines acting out all possible states that universe could experience given its constraints.

Now what about two separate universes with almost identical starting conditions that happen to share an almost identical timeline that leads to your birth? Are your near-copies the same you experiencing different universes, or just seperate clones?