Crossposted at fandom_lounge and at my Dreamwidth journal where the videos embed.

You don't have to wonder. Here click on the link for Westworld intro with Game of Thrones theme, and here is Game of Thrones intro with Westworld theme.  It helps that the themes are by the same composer and they're both HBO shows. It doesn't help that, even with a Dreamwidth installation, videos still don't embed here.