Falsely vs Untruthfully - What's the difference?

As adverbs the difference between falsely and untruthfully

is that falsely is in a false manner while untruthfully is in an untruthful manner; falsely.

(en adverb)

In a false manner.

He protested his innocence to the end, claiming he had been falsely charged and convicted.

* 1910 , "PRINCETON'S GRADUATE COLLEGE; Issues a Denial [....]", in New York Times , Feb 4, 1910

This could not be more falsely stated.

* 1989 , "Why Kill A Pollster?", in Washington Post , Dec 9, 1989

Our insensitive laughter echoes even more falsely now.

* 2003 , "Wordsworthian Southey: the fashioning of a reputation.", Wordsworth Circle , Jan 1, 2003

And on none of them does the name ring more falsely than on Robert Southey.