As far as I've seen, I think time travel is the only thing they have in common so far. Does anyone know if RTP uses a real historical backstory? This one does, it uses the plotting and issues/problems that happened with the Queen In Hyun during King SukJong's reign.
By the way, *has anyone seen ep. 2? She traveled back in time this time, right? I mean, the blood on her dress along with the body disappeared (like it would if 300+ years would pass)* That looked kind of cool. A lot better than the (RTP spoiler from the first episode, I think) *jump over the moon in RTP... just sayin'.