gerunds - prefer doing vs prefer to do

Just saw this: "prefer ~ing" / "prefer to infinitive" and I am wondering if there are any differences between "prefer doing" and "prefer to do".

I have read a book about grammar that says there is a subtle difference between them, and I would like to confirm this concept. Am I right about the following?

gerund:

refers to a habit

e.g.: I prefer swimming than running. (This is a preference I have in everyday life)

to-infinitive:

refers to a particular event

e.g.: I prefer to have a cup of coffee. (I only want a cup of coffee this time, I may want a cup of tea next time)

Thanks!