[Nevermark]

The ratio is 10^90 which is not small. The subtractive difference rounds to 10^170. In either case, I think its fair to say that 10^170 is unimaginably larger than 10^80.

But if differences become so large we cannot imagine the differences, then we could imagine there are no differences at all, so ... psychologically/subjectively there would be no difference?

[bmm6o]

The comparison in question is between 10^170 and 10^160 (= 10^80 * 10^80). So "just" a factor of 10^10.