As mentioned by others: during the ToP, Goku /w/ SSB+KKx20 was absolutely nothing to suppressed Jiren. Then Goku activated Sign the first time and was able to bridge the massive gap between he and Jiren. So it was probably something like 40-50x SSB.
Though I don't think the difference between MUI and Sign is nearly as vast. The implication during the ToP is that MUI was essentially Goku unlocking the offensive component that he lacked in Sign. It definitely provided a power boost as well(as evident when Goku easily palmed and gestured away Jiren's energy attack, and then proceeded to defeat FP Jiren.) But DB history tells us that a relatively small gap between fighters can often equate to an absolutely one-sided shitstomp.
Goku vs. Nappa
Goku vs. Vegeta
Vegeta vs. Cui
Vegeta vs. Dodoria
Goku vs. Recoome
SS Goku vs. Freeza
SS2 Gohan vs. Perfect Cell
Bootenks vs. Mystic Gohan
So based on my own head-canon, I'd say that MUI was 2-4x Sign, which would put it anywhere between 80-200x SSB. You'll see a lot of people throw around multipliers that are WAY higher, though.
No clue what the gap is between SSB and UI now, though. SSB Goku is far more powerful than ever thanks to Merus' training, and Toyotaro is basically treating Sign as a transformation(with both defensive AND offensive capabilities) that is > SSB, but obviously still < MUI... To some unknown extent. /shrug
"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
Last edited by Galan007 on Jul 12th, 2020 at 03:35 PM