Yeah, I tend to retain a lot more from fiction. Like, a month after having read them both at approximately the same time, I am retaining a lot more about Jemmy and Charles from The King's Touch than I am about the queens in A Game of Queens. But that of course is also a function of not knowing very much history :)

I'm in the middle: I used to remember much more from fiction than from non-fiction during my first 20 years of life, but once I started to do research in earnest, this changed, and now it's even - though I retain less from dull sources of either variety. :)

Btw, am glad to hear Charles and Jemmy remained with you, as I'm curious about your take on the novel, the relationship etc.!