You took the left fork.

Rewind the world, but not you. Repeat, but this time let the RNG of the universe choose another direction for that stick.

You took the right fork.

Both happened… you went down both forks, but you only know the fork you went down alone.

Exactly the same thing would occur… if you’re the cloned you’d see through your own eyes. If you were the clone, however, you’d see through the clone’s eyes. You’d be you to you in both cases, despite now being different yous.

Considering we’re all, effectively, clones of each other (modulo an actually extremely small amount of genetic drift) this shouldn’t feel all that surprising. Your brother isn’t you, neither is your fraternal twin, neither is your identical twin, and neither is your conjoined twin.

If there were a “stargate” that worm holes you to another location there’s a little dirty secret, the destination side is actually a fully entangled duplicate (matter does not transfer only “information” and complete entanglement). If the original is not incinerated (by design) there will be two.

Your barbaric man animal mind will unlikely be more than momentarily disoriented. With special training and development you can absolutely still perceive your other. Without being maintained the link would fade to decoherence.

If you had this skill you would not need the “stargate” to travel among and perceive the minds of others through entanglement.