I don’t have a problem differentiating my “real” men from my “fictional” ones but I haven’t undergone the ultimate test yet, reading a book with #1’s name in it. If any male is going to infringe on my fantasy land it would be him. I do however sometimes struggle when I read books back-to-back that feature characters with the same name. It can take me a couple of chapters before I switch gears and replace one face with another.
I have a similar problem with books that have been made into movies; if I watch the latter before actually reading the novel it messes with my head. I read Game of Thrones after having seen the first season and try as I may, Tyrion Lannister will forever be linked to Peter Dinklage and Jon Snow to Kit Harington. I have a feeling that the same thing will happen if I ever decide to give the Sookie Stackhouse series a whirl; my version of Eric Northman will never be able to measure up to Alexander Skarsgard.