

So in Dragon Ball Heroes is pretty clear, Goku Ultra Instinct is able to
overpower Cumber, something Super Saiyan Blue Vegito Kaioken times 50 wasnt
able to do. So in Dragon Ball Heroes Ultra Instinct has over 50 times a larger
multiplier than Potara Fusion. But how about the canon universe? Are there
hints or statements which shows which would have a larger multiplier, Ultra
Instinct or Potara fusion?


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dragon-ball-series dragon-ball-super
Does Ultra Instinct have a larger multiplier than Potara fusion?


The Multiplier for **Ultra Instinct** is definitely greater than the **Potara
fusion Multiplier**. We know this as the _SSJ Vegito_ for the Buu Saga, is
nothing in comparison to MUI Goku. There are several other examples indicating
the same:

  * SSJG Goku being stronger than Vegito in the Buu Saga(MUI is several times stronger).
  * UI Omen completely overwhelming SSJ2 Kefla and MUI is even more stronger.

The Potara fusion is also dependent on the characters who fuse and I think it
is safe to assume the multiplier always stays constant. Disregarding the power
of the fused characters, the potara fusion multiplier will never be > than the
Ultra Instinct Multiplier. It wouldn't make logical sense for a potara fusion
between Hercule and say, one of his students, be able to go toe to toe with a
god of destruction.


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answer


Your real question seems to be-how does Ultra Instinct work in comparison to
Potara?

Potara combine the max power of the fused and then multiply it several times.

Ultra instinct base form-was weaker than Jiren in normal form. Each Jiren
power up after that was definitely implied to be a multiple of his base form.
Now, once UI was mastered, the increase in power from base form to strong
enough to beat super maxed out jiren-would have had to be a multiplied enough
to overtake him.

So potara is x+x = 2x * 2(or more) = Total

UI is X * X ^ X

UI would be a greater upgrade, the farther Goku reached into it


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