What similar instrumentation? One is orchestral, one is a strum along guitar song. HArd to write a song in a straight major, minor keys that doesn’t bare some similarity to some other song some guy somewhere in the world has written. Pretty soon the Chuck Berry estate is going to be suing every rock guitar song that used double stops in their music.
Looks like a similar chord structure to about 50,000,000 other songs, yet the production/performance made it sound fresh , and of course perfect for the scene.
https://www.e-chords.com/chords/frozen/let-it-go
Does anyone have a patent on the key of G? Cause if not….