Congruence vs Transformational - What's the difference?

As a noun congruence

is the quality of agreeing or corresponding; being suitable and appropriate.

of, pertaining to or leading to transformation.

(wikipedia congruence)

(en noun)

The quality of agreeing or corresponding; being suitable and appropriate.

(mathematics, number theory) a relation between two numbers indicating they give the same remainder when divided by some given number

(mathematics, geometry) being isometric — roughly, the same size and shape

(algebra) more generally: any (l) defined on an (l) which is preserved by defined by the structure

* congruency, congruity

(en adjective)

Of, pertaining to or leading to transformation

* transformational grammar