Although similar, they are extremely intentional and I LOVED hearing this explanation from the writer of music, Ramin Djawadi
“The beauty about music in film is that without any dialogue on the screen you are able to guide the audience . . . By moods or even playing a certain theme, you are able to tell a story.”
For more on . . .
-N- Stuff : Movies Without Soundtracks : Music : Game of Thrones