A point or two is not 91 octane to 92 or 93 octane.

It's 91 octane to 91.2 or 91.3 octane. That's the "point" as in point two or point three octane.

But yes, MMT works better than petroleum distillates, much better, but not as good as TEL.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.